View source for Eye of Newt

{{trope}}
{{quote|''"Fillet of a fenny snake,
''In the cauldron boil and bake;
''[[Trope Namer|Eye of newt]] and toe of frog,
''Wool of bat and tongue of dog,
''Adder's fork and blind-worm's sting,
''Lizard's leg and howlet's wing,
''For a charm of powerful trouble,
''Like a hell-broth boil and bubble."''
|'''The Three Witches'''|''[[Macbeth]]''}}

The [[Spell Construction|material (or immaterial) component]] you [[Ritual Magic|need to call forth a spell]] or activate a superpower. It's not as simple as just spending [[Mana]], though. You may need to burn a pinch of sulphur, or to sacrifice the soul of your first born child. Either way, you've got to pay the price before you can throw lightning from your fingertips. If the value of what's sacrificed ''has'' to equal the value of what's gained, it's [[Equivalent Exchange]].

These components usually fall into one of four categories, with some overlap.

* Symbolic items: wedding rings, grave dirt, a pure red rose. Some materials, such as gold and silver, carry heavy symbolic value all by themselves.
* Body parts from exotic creatures, sometimes from creatures that don't actually have those body parts - hen's teeth. The more magical the creature the better. A unicorn's horn beats a crocodile's liver, but the blood of a god is better still. Doubly so if [[Body to Jewel|it has crystallized]]. Upping the danger, the creature is sometimes a [[Monster Lord]].
** Or just a body part from your [[Sympathetic Magic|intended victim or other recipient]].
* Items with improbably specific requirements - an unripe Sunset Wonder picked 3 minutes before noon on the first frosty day in the autumn and peeled left-handedly using a silver knife with a blade less than half an inch wide.
* [[Insubstantial Ingredients|Non-physical components]] - bottled moonlight or the sound of a cat's footsteps.

[[Black Magic]] often requires [[Powered by a Forsaken Child|ingredients]] that cross a [[Moral Event Horizon]] just to collect.

Sometimes this trope is used to justify [[Plot Coupons]] as necessary ingredients. Improbably specific requirements can be used to set up impossible challenges. If one of the 'ingredients' happens to be the caster's immortal soul, then it's a [[Deal with the Devil]]. A reusable ingredient is a specialised form of [[Magic Wand]].

Compare with the [[Magical Incantation|actual words of the spell]], and associated [[Magical Gesture]]s.

A subtrope of [[Functional Magic]].

{{examples}}
==  Anime and Manga  ==
* In the ''[[Ranma ½]]'' manga spell components are sometimes needed by the magic users.  For example, Happosai needed the tears of a creature both male and female for a rejuvenation potion.
** Happens once or twice in the anime, too. In "The Last Days of Happosai...?", [[Lethal Chef|Akane Tendo]] tries to prepare a magical elixir that will revitalize the dying pervert—it's implied her usual lack of skill in the kitchen is the source of the potion's nauseating stink, which eventually renders all of the others in the house bedridden with sickness. Eye of newt and toe of frog are even actual ingredients.
* In ''[[Great Teacher Onizuka]]'', one member of a trio of witch-wannabes drinks a [[Love Potion]] and accidentally sees Onizuka first. They try to use black magic to negate the power of the spell. Ingredients include bat wings (procured from the science department), toad warts (ditto), and ''Onizuka's pubic hair'' (uh...).

==  Film  ==
* Parodied in the movie ''[[Robin Hood: Men in Tights]]'', where Latrine is apparently putting together a scrying spell with all sorts of gooey ingredients, including "eyeballs of a crocodile". A moment later we learn she's not a witch at all; [[Squick|she's the cook]].
* ''[[Warlock (comics)|Warlock]]'' used the body fat of a non-baptised child as a levitation potion. Baptise your children, people!
* You know that song the choir's singing near the beginning of ''[[Harry Potter]] 3''? Taken directly from [[The Scottish Trope|The Scottish Play]]. "In the cauldron boil and bake fillet of a fenny snake..." and of course the inevitable [[Inadvertent Entrance Cue|something wicked this way comes]] finish.
* ''[[Alice in Wonderland (2010 film)|Alice in Wonderland]]'': 
** The White Queen's recipe for the shrinking potion (which Alice originally found in a bottle labeled "Drink Me", called Pishalver in this movie) is urine of a horsefly, a pinch of worm fat, a "buttered finger" (a severed finger from something obviously inhuman); she finishes making this by ''spitting'' in it. Alice shows no reluctance to drink it, but then, she ''is'' pretty desperate to return to her regular size. 
** The recipe for the cakes labeled "Eat Me" that make Alice grow (called Upelkuchens in this movie, "kuchen" being German for "cake") is two cups of flower (''not'' flour), one cup of sugar, a pinch of fungus, worm fat, a tongue of a blowfish, a pinch of thyme, three coins from a dead mans pocket, and [[Insubstantial Ingredients|two tablespoons of wishful thinking]]. This recipe is [[All There in the Manual| only revealed in an early draft of the script]].

==  Literature  ==
* ''[[Discworld]]'' magicians sometimes need components to [[Equivalent Exchange|make sure their spells work within the laws of physics]]. When teleporting, for example, an equal mass is usually displaced from wherever the wizard plans to get to.
** In addition, we often see witch spells requiring ingredients, such as in ''[[Wyrd Sisters]]'', a direct send-up of ''[[Macbeth]]'' which contains a scene parodying the above quote. The cottage Magrat lives in used to belong to a "[[Sufficiently Analyzed Magic|research witch]]", who asked questions like "it's all very nice to say 'eye of newt', but what ''species'' of newt? And would it still work if you substituted something less icky?" and wrote all her research down in dozens of volumes.
* In the ''[[Young Wizards]]'' series many spells ''used'' to require hard to find physical components, but as successive generations of wizards improved the spells the components were changed to easier to find substitutes, and eventually the spells were perfected to the point where they needed no components at all. The modern-day characters which the series follows only rarely have to cast a spell which requires any sort of physical component.
* In the book ''[[The Princess Bride (novel)|The Princess Bride]]'' we are told that they had to search for strange components before Miracle Max could do a miracle, but we aren't shown it because it would take too long.
* Ingredients in ''[[Harry Potter]]'' potions include a bezoar and bicorn horn, and the brewing of Polyjuice Potion involved particular parts of a lunar cycle.
* ''[[The Dresden Files]]'' sometimes uses non-physical components gathered under specific conditions. E.g Harry had to be truly happy in order to gather sunlight into a handkerchief.
** Potions specifically need 8 ingredients. A base liquid, one ingredient for each sense as well as one each for the spirit and the mind. A love potion, for example used tequila as a base, money for the mind, chocolate for taste, perfume for smell, lace for touch, a sigh for sound, candlelight for sight, and the ashes of a romance novel for spirit (though it probably would have worked a little less ''sleazily'' if they hadn't used substitutes for the original base, mind and spirit ingredients—champagne, powdered diamond and the ashes of a love letter.)
** Ordinary magic can be done without physical ingredients or foci, but no-one does it that way. You can just create the things you need in your mind, but if your mental image slips just a little, your spell will fail. Trying to do it that way, rather than with a physical object, is much more difficult and makes no difference in effect, so no-one bothers unless the midden hath hit the windmill, big time.
* [[Ethshar]]ian wizardry uses ingredients like this - a raindrop caught in midair, the blood of an unborn child.
* One of the characters in ''[[Iron Council]]'' is a monk from a special order that discovers secrets. To do so, however, the monk has to sacrifice one of his/her own memories or abilities each time he digs up new info.
* In ''[[The Neverending Story (novel)|The Neverending Story]]'', Bastian discovers that every time he uses his amulet to "change" things, he sacrifices one of his own memories. Eventually, he develops full amnesia. {{spoiler|He gets better.}}
* In ''[[Dream of the Red Chamber]]'', Precious Virtue's Cold Perfume Pill has a vast list of peculiar ingredients which are so rare they can only make a batch every twenty years or something.
* In the ''[[Enchanted Forest Chronicles]]'', Cimorene searches in vain for months to find some hen's teeth so that she can complete a spell to protect her against fire (she's employed by dragons). She eventually has to get them from a genie.
* In ''[[Charlie and the Great Glass Elevator]]'', the recipe for Wonka Vite (a youth serum) has many complex and fantastical ingredients, some of which seem impossible to obtain. The only common ingredient is chocolate, but one pill requires a ''ton'' of it. Other ingredients include a cow's horn (must be a ''loud'' horn), the front tail of a cockatrice, the hoof of a manticore, a wart of a warthog, a mole's mole, and the four tentacles of a quadrapus. Of course, seeing how closemouthed Wonka is about most of his creations, [[Fridge Logic| this may have been a phony list.]] 
* A couple of books from ''[[Kushiel's Legacy]]'' use this trope; the end of the first series ('Kushiel's Avatar' I believe) has the bone-priests that  {{spoiler|only get their power by sacrificing someone that they love. The Mharkagir tries this with Phedre but she kills him instead; [[Monty Python and the Holy Grail|and there was much rejoicing.]]}}. 'Kushiel's Mercy' (end of the second series) has Carthage trying to take over Terre D'Ange with some pretty involved magic. The stone trapping the elemental has some pretty [[Nightmare Fuel|icky]] requirements ( {{spoiler|infanticide being the big one}}) and the needle that afflicts Imriel with madness (and thus saves him from the bigger spell the Carthaginians are casting) requires toad-bile, lunatic sweat and being left in the light of the full moon (and NOT being in any other light) for a full month. Wonder what the process was for finding all that out.
* In [[Robert E. Howard]]'s [[Conan the Barbarian]] story "[[A Witch Shall Be Born]]" the title witch does not want this kind of magic.
{{quote|''I could never endure to seclude myself in a golden tower, and spend the long hours staring into a crystal globe, mumbling over incantations written on serpent's skin in the [[Blood Magic|blood]] of [[Virgin Power|virgins]], poring over musty volumes in forgotten languages.''}}
** In "[[The Tower of the Elephant]]", the rope
{{quote|''It was woven from the tresses of dead women, which I took from [[Grave Robber|their tombs]] at [[When the Clock Strikes Twelve|midnight]], and steeped in the deadly wine of the upas tree, to give it strength.''}}
** In "[[The People of the Black Circle]]," they needed the king's hair.
{{quote|''All discarded portions of the human body still remain part of it, attached to it by intangible connections. The priests of Asura have a dim inkling of this truth, and so all nail trimmings, hair and other waste products of the persons of the royal family are carefully reduced to ashes and the ashes hidden. But at the urgent entreaty of the princess of Khosala, who loved Bhunda Chand vainly, he gave her a lock of his long black hair as a token of remembrance. When my masters decided upon his doom, the lock, in its golden, jewel-encrusted case, was stolen from under her pillow while she slept, and another substituted, so like the first that she never knew the difference. Then the genuine lock travelled by camel caravan up the long, long road to Peshkhauri, thence up the Zhaibar Pass, until it reached the hands of those for whom it was intended.''}}
* In ''The Patchwork Girl of Oz'', one of [[L. Frank Baum]]'s [[Land of Oz|Oz books]], Ojo is collecting the ingredients to restore people from [[Taken for Granite|statues]]. He is arrested for collecting a six-leafed clover; Ozma made it illegal to collect such ingredients because people refused to obey her anti-magic law. Later, he finds the hardest—a drop of oil from a living man—which is from the Tin Woodman. Alas, he also needs the left wing of a yellow butterfly, and the Tin Woodman refuses to allow a butterfly to be harmed for the spell. Luckily, Glinda the Good doesn't need these ingredients.
* In L. Jagi Lamplighter's ''[[Prospero's Daughter]]'' trilogy, phoenix lamps, lit by phoenix feathers, and the Water of Life, retrieved from a well at the edge of world, are the first of many, many, many such items.
* In ''[[War of the Dreaming]]'' by [[John C. Wright]], magicians use symbolic objects to compel obedience from the spirits who respond to them—such as moon rocks from the Apollo missions.

==  Live-Action TV  ==
* Obligatory ''[[Buffy the Vampire Slayer]]'' mention. Various ritual spells require various components, some even require the Eye of Newt.
** Although in an interesting subversion?/aversion?/inversion? It is shown that it doesn't need to be an actual newt, since a frog's eye works just as well.
** In ''[[Angel]]'' Wesley is analysing a [[Fantastic Drug]] which has PCP-like effects on demons, and mentions that Eye of Newt has been added to improve the taste rather than the kick.
* Potion ingredients are the [[Plot Coupon|plot coupons]] in ''[[The Legend of Dick and Dom]]''; to cure their kingdom from plague, they need to collect two seasons' worth of ingredients like a dragon's [[Bizarre Alien Biology|clack]], the mists of time, baby vampire vomit, and [[Arson, Murder, and Jaywalking|a pint of milk]].
* In ''[[Charmed]]'', potions sometimes require these, but good ones usually use more benign herbs.

==  Tabletop Games  ==
* A number of spells in many versions of ''[[Dungeons & Dragons]]'' (AD&D 1e, AD&D 2e, and D&D 3.x) require use of material components. For standard spells, like ''fireball'', this requires something trivial and commonplace (like bat guano and sulfur rolled into a ball) that one can BS away by having a spell pouch on them. For more powerful spells, like Raise Dead, you're expected to pay cash money to use them (in the form of a pile of diamonds worth 5000 gp).
** Some are even more unpleasant. The components for ''spider climb'' are a drop of bitumen and a live spider; you have to ''eat'' the spider.
** Still, if that sort of thing isn't easy enough for you, there are feats like Eschew Materials (which is [[Exactly What It Says on the Tin]], for material components that don't mention a money cost), prestige classes like the runecaster, which allow you to replace expended material components with permanent rune-carved objects (one wonders what the replacement for ''fireball'' is...a little stone ball with "bat poo and sulfur" carved in Draconic?), and others.
*** Why not "Burn!" or "[[Girl Genius|Everything goes boom!]]" on Ignan?
** D&D Fourth Edition has removed this from standard spells, but the more powerful rituals require material components.
* Similarly, material components, while not ''needed'' for most spells in ''[[Warhammer Fantasy Roleplay]]'', did provide a (generally trivial but) much appreciated bonus to your spellcasting attempt.
* In ''[[Mage: The Awakening]]'' extended spellcastings are made easier by the sacrifice of a 'sacrament'; an item metaphorically relevant to the spell being cast (for example, burning a map to create a portal).
** Also, for Archmasters to cast an Imperial (i.e. godlike) spell, they require a 'Quintessence', a metaphorical component, such as an ingredient or event.
** "Gross matter", substances which can be imprinted with magic (effectively making potions) can only be manufactured by gathering materials thematically relevant for the kind of gross matter you are trying to make (different kinds can be imprinted with different spells; for example, spells that affect perception need to be imprinted into eye drops), before using a spell to transform it.
* In ''Urban Arcana'', the modern day [[Dungeon Punk]] variant for [[D20 Modern]], a special variant of spellcasting called "Incantations" are available. These Incantations are lengthy yet powerful procedures that require materials appropriate to the spell in question. For instance, demon summoning would likely require a virgin sacrifice and an obsidian knife, whereas the consecration of a building would require holy water and a recitation of prayer.
* Ritual magick in ''[[Unknown Armies]]'' has this as its great drawback. Rituals may need anything from a scratched brass doorknob to [[Eye Scream|your own eyeball]] to "acres and acres of burning tires".
* ''[[GURPS|GURPS Magic]]'' mostly handwaves these away: most spells require some sort of unspecified material components, but wizards usually have what they need on hand. The [[Game Master]] is advised to elaborate on this if a shortage of a component would help [[Game Breaker|curb abuse of a problematic spell]], or just provide plot hooks. ''GURPS Thaumatology'' provides optional elaboration on this, and its alternate magic systems go into detail about the use of material components in folklore and fiction.

==  Theatre  ==
* The [[Trope Namer]] comes from the witches' song in ''[[Macbeth]]''.

==  Video Games  ==
* ''[[The Elder Scrolls]]'' has a whole alchemy system that allows you to use ingredients with set effects to make potions with those effects. Or you can just eat them and get their effects for a brief time, even though some of the ingredients are plainly inedible. (Raw Glass, anyone?)
** You still need to have a high enough alchemy skill just to get all the effects of eating it directly. It's [[Hand Wave]]d that it has to do with a specific way you chew it.
* According to [[Wario Ware|Ashley]]'s theme, an eye of newt is a component of one of her favorite hexes.
** And Grandma's wig and kitten's spit!
* [[Ninja]]s in ''[[Final Fantasy XI]]'' require ninja tools to perform their ninjutsu spells. The sheer amount of tools used to [[Stone Wall|tank]] (No, Really), as well as the cost of the other tools make Ninja one of the most expensive jobs in the game.
** Likewise, Corsairs need elemental cards to fire elemental blasts from their guns.
* The first three ''[[Ultima]]'' games had rituals with elaborate requirements for each spell, but they were [[All There in the Manual]]. ''Ultima IV'' had you manually mixing up spells out of each reagent, typing incantations in the game's [[Fictionary]], and then binding them with a small sacrifice of mana for later casting (with more mana.) Later games kept the reagent system, but did the rituals for you automatically.
* This is how magic works in ''[[The Sims]] 2''. Spells are fueled by objects called reagents that you can either buy or make for free, though making them takes time. Good spells are made with good reagents, such as dragon scales willingly given by an elder dragon, and evil spells are fueled by evil reagents, such as literal Eye of Newt made by..well take a guess. This is [[Informed Ability]] and [[All There in the Manual]], all the sim actually does is stir a cauldron to create the reagents.
* In ''[[King's Quest III]]'', Gwydion has to gather the ingredients from throughout the realm and use them to cast spells, all while fearing that his wizard master may return and smite him. This worked out nicely in the context of an adventure game, where [[Kleptomaniac Hero|manipulating items]] is always a core ingredient.
* ''[[World of Warcraft]]''. 
** All you mages know ''exactly'' what I'm talking about. "What? You told me to port to Stormwind! Bah, alright, I'll come to Darnassus, ''but you're gonna pay for the reagents!'' This costs money, ya know!"
** All caster classes have a few spells that require physical components; mages' portals are simply the most well-known. Most other ones can bypass this if the character has the appropriate Glyph.
** The Northend daily quest "Alchemist Apprentice" involves helping the troll alchemist [[Shout-Out| Professor]] [[The Nightmare Before Christmas| Finklestein]] make a truth serum, with ingredients that range from normal-sounding (like Icecrown Bottled Water) to unusual (Raptor Claw and Pickled Eagle Egg) to bizarre (Hairy Herring Heads??) to just plain gross (Putrid Pirate Perspiration and Crystallized Hog Snot??).
* All of the magic in ''[[Secret of Evermore]]'' revolves around alchemy formulas which each require different regents.
* In ''[[Albion]]'', one of your party's spellcasters requires a special seed to be thrown at target. You buy these or pick from bushes occurring occasionally in wilderness.
* One of the ways you can gain more magic in ''[[Final Fantasy VIII]]'' is by refining [[Vendor Trash]] into usable spells via a special ability.
* A potion in ''[[A Vampyre Story]]'' requires a nightshade blossom, a gargoyle's breath, a virgin's bone, and a literal eye of newt. The first three she manages to scrounge up, but it's the middle of winter, meaning no newts. So she uses the eye from a picture of a newt in a coloring book. This works perfectly.
* ''[[RuneScape]]'' has lots of odd ingredients for spells, though baby blue dragon scales, red spiders' eggs, and (what else?) the eye of newt are some of the body parts necessary for potions. Then you get the Rag and Bone Man, who asks for some really strange bones. Shoulder bone of a of giant? Tail bones from nine kinds of dragon? Pelvis of a four-legged, magic-casting water creature that dwells in caves? Fibula bone of the third leg on an '''adult''' three-legged creature? He wants them all and more. {{spoiler|He serves an [[Eldritch Abomination]] that wants to rebuild itself with all the bones. [[Squick]].}}
* In ''[[The Legend of Zelda|The Legend of Zelda: Breath of the Wild]]'', Link can gather parts of defeated enemies, like Bokoblin Horns and Chuchu Jellies, and cook them with insects and lizards into potions and Elixirs. He can also give these items to Fairies to enhance his armor.

==  Web Comics  ==
* In ''[[Sluggy Freelance]]'' some spells from the Book of E-Ville require certain physical components.
** Gwynn [http://www.sluggy.com/daily.php?date=060602 found a spell] to cure [[Blind Without'Em|her eyesight]] that required "parts" from some monkeys. She bought the monkeys, but couldn't go through with the spell, keeping them as pets instead. [http://www.sluggy.com/daily.php?date=060604 Much] [http://www.sluggy.com/daily.php?date=060625 hilarity] [http://www.sluggy.com/daily.php?date=060626 proceeded] [http://www.sluggy.com/daily.php?date=060723 to] [http://www.sluggy.com/daily.php?date=061208 ensue].
** Another spell to open a dimensional portal required candles, drops of blood in a chalice, and a chicken quite specifically ''not'' [http://www.sluggy.com/comics/archives/daily/080603 set on fire].
* ''[[The Order of the Stick]]'' illustrated D&D version - including bat guano, as seen on [http://www.giantitp.com/comics/oots0020.html this] page. 5000 gp worth of diamonds mentioned in [http://www.giantitp.com/comics/oots0286.html this] one.
** Price of components was toyed with in [http://www.giantitp.com/comics/oots0677.html this one], with the valuation being crucial to the spell.
* ''[[Eerie Cuties]]'' / ''[[Magick Chicks]]'' 'verse have ''most'' spells running with but a few words and/or gesture at a moment's notice, and most of the rest require a [[Geometric Magic|diagram]]. However, there also are ''interesting'' applications for things like [http://www.magickchicks.com/strips-mc/watch_your_buns pixie dust].

==  Web Original  ==
* The dark magic that Hekate does in the [[Whateley Universe]], like her spell in "It's All In The Timing", is exactly this trope.
* [http://hellej.elfwood.com/Theres-a-Fly-In-It-.2795145.html This picture]{{Dead link}} by Helle Jorgensen reminds witches: take necessary steps to prevent possible contamination by unintended components.

==  Western Animation  ==
* An episode of ''[[Jackie Chan Adventures]]'' dealing with a [[Jiangshi]] had what's probably a parody of the third type - to permanently banish the hopping corpse, Jackie and colleagues were required to take a toadstool from a graveyard, place it in the Jiangshi's own left sock (which, of course, it wasn't about to just hand them), and throw the sock into a river.
** That's not a parody, people actually believed that, though usually the sock was filled with rocks or soil from the vampire's grave. And yes, Chinese vampires hop.
** A lot of Uncle's spells in general follow this theme where certain items are needed. The animal location spells each required an item going along with that animal.
*** There's also those dead blow fish and lizards he uses quite often.
* An episode of ''[[American Dragon: Jake Long]]'' has Fu Dog using Eye of Newt simply because it's used in so many potions.
* In a Halloween episode of ''[[The Simpsons (animation)|The Simpsons]]'', Patty and Selma are witches, cooking the classic recipe...
{{quote|"Needs more Eye of Newt."
"You always want more Eye of Newt. If it were up to you, the soup would be nothing but Newt Eyes!" }}
* In the 2012 version of ''[[Teenage Mutant Ninja Turtles]]'', Donatello tells Michelangelo that the retro-mutagen is made of uranate, anolite, [[Stealth Insult| moronic acid]], and [[Arson, Murder, and Jaywalking| garlic cappuccino pizza]]. Subverted in that he's clearly pulling Mikey's leg, although [[w:Uranate|uranate]] is [[Aluminium Christmas Trees| actually a real chemical.]]
* This happens a few times in ''[[The Owl House]]'', seeing as most of the cast are magic-users. For example, in the season two opener, Lilith attempts to brew a scrying potion whose recipe calls for Fire Bee Honey, Portuspine Quills, Snaggleback Snaggleteeth, and Fairy Tears, although the viewers only see her gathering the first one and having to be rescued from the ferocious bees by Hooty.
** Also, creating a Grimwalker (a sort of magical clone) requires (according to what the viewer can read in Belos' notes) a [[Mineral MacGuffin| Galdorstone]], Palistrom wood, [[Everything Is Better With Dinosaurs| Stonesleeper]] lungs, [[Sea Monster| Selkidomus]] scales, the bone of an ortet, and a sample of the tissue of the person you want to clone.
* ''[[Animaniacs]]'':
** In "Spell-Bound" (which was, incidentally, the first half-hour episode starring Pinky and the Brain exclusively) the first four ingredients for Brain's “Take Over the World Spell” are six lizard legs, two eyes of newt, two hedgehog spleens, and one half-eaten gingerbread cookie that’s been left on the counter overnight. Getting the final ingredient, a red dragon toenail clipping, is the main plot.
** In [https://www.youtube.com/watch?v=c3e2pGHyG8A this short], Yakko provides his own, uh, unique interpretation of the original witches' recipe, with Dot, Slappy, and Hello Nurse as the witches, provided for viewers who - like Yakko, Dot, Slappy, and Hello Nurse - have ''no'' idea what it means.
* In ''[[Adventures of the Gummi Bears]]'', making Gummiberry Juice is far more complex than simply juicing berries. First it requires fresh springwater, to which six handfuls of red berries are added, followed by four orange berries, three purple berries, four blue berries, three green berries and one yellow berry, in that order. Then the mixure must be stirred ''slowly'' to the left, then to the right, and finally, the cook must tap the side of the cauldron to banish the bubbles, stabilizing the inherent magic and ending up with juice. Stirring it too quickly or in the wrong direction risks causing it to explode, and botching the recipe can have dangerous side effects on whoever drinks it. For example, in "The Secret of the Juice", Grammi purposely leaves out the purple berries when Igthorn forces her to make it, causing Igthorn and his henchmen to expand and float like balloons when they drink it.

==  Real Life  ==
* Hoodoo folk magic is made of this trope. Components can include (but are by no means limited to) red brick dust, graveyard dirt (preferably from the grave of a soldier or a child), coffin nails, dried bat hearts, and raccoon penis bones, not to mention various bodily fluids. Much of the lore comes down from rural areas in the 1930's, when such ingredients were much easier to obtain than they would be today (or not: a random Google search can and will turn up various shops selling such items online, many disturbingly authentic).
** Researching hoodoo folklore, [[Zora Neale Hurston]] was told that a bone from a black cat would bestow powers of invisibility on its owner. Hurston claimed to have participated in a ritual to obtain the bone, which involved  {{spoiler|tossing a live cat into a pot of boiling water, then leaving it to scald until the flesh and bones detached and floated to the surface. After which, the participant had to stand in front of a mirror and place each bone under his/her tongue until he/she vanished. http://xroads.virginia.edu/~ma01/grand-jean/hurston/chapters/hoodoo4.html#6}}
** That exact spell appeared in ''[[The Once and Future King]]''.
* Averted by Real Life:  despite centuries of tradition, formulations such as the Trope Namer are ''not'' literal -- all these [[Squick]]y ingredients are actually [https://people.howstuffworks.com/is-eye-of-newt-real-thing.htm nicknames for far more mundane herbs and plants], used to keep the components of a potion or spell secret if overheard by the uninitiated (or perhaps to frighten the rubes).  "Eye of newt", for example, is a "codename" for common mustard seed, and "tongue of dog" is the plant better known as [[w:Cynoglossum officinale|houndstongue or houndstooth]].

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