Fey Recipes and A Fistful of Butter

A handful of recipes have been found that mix the arcane and culinary arts.
They all require 3 ingredients at one step or another: ground Moon Flower petals, ground Sun Flower petals, and strangely, a fistful of butter. Any butter will do, but it must be 1 fistful, sized for the person preparing the recipe. These recipes can also only be prepared by 1 person.
Ranging from a simple 5 ingredient biscuit (3 of which are required by default) that 4-year-old could manage, to absurd towering edible constructs that stand taller than a person and change colors, fey recipes cover the spectrum of complexity and creativity.
To monarchs, nobility, and other rulers, these recipes are worth their weight in gold because if any other steps are taken, the recipe would become instantly recognizable as an inedible mess, meaning they are tamper-proof and thus cannot be poisoned.
The odd thing about these recipes is that the ingredients or measurements scale with the size of the person. No matter the size of the person preparing the dish, the measurements are relative. That is to say that the fistful of butter' requires exactly 1 fistful of butter for a small child or a fistful from the burliest person with a fist that could hold the aforementioned child.
Attempting to measure an approximate amount (which likely requires you to grab a fistful of butter anyway) will cause the spell/dish to fail. Oddly enough, the flavor is generally about the same despite the size difference, with minor variations being noted that are thought to be due to elemental affinities.
Another curious note is that the result will scale with the person preparing it, seemingly considering appetite. If a small child made a recipe and was hungry, they would get a full portion's worth of the dish, sized exactly for them. If a grown man made the recipe and was just slightly hungry or wanted a snack, he may end up with a dish that is smaller than the fistful of butter (or other oddly measured ingredient) he put into it.

Summary

Recipes that seem to be a mixture of magic and cooking, the results scale according to appetite and size of the one preparing it.
Fey recipes are very much a "trust the process" kind of thing, assuming you know the process.

Historical Basis

These recipes supposedly came about due to a kitchen argument between a high elf and a dark elf chef, each claiming that Moon flowers and Sun Flowers respectively were the best seasoning for a specific dish. After much screaming, and throwing of ingredients, including a fistful of butter, as well as a flash of blinding light, it is said that the first dish was born.
Legend also has it that their anger transferred into the dish, and along with its materialization, came a shockwave that knocked them both back. Coincidentally, the dish became known as the 'Pie of Celestial Wrath', and the "Fey Recipe' was in recognition of the Elven species responsible for it, and the mystical nature of the recipe.
Make no mistake, this 'myth' has been proven to be true to an extent. Its mythical nature rests in the unknown aspects of it; the processes and recipes behind them, and how those recipes came to be in the first place. Proving recipes has also become a fun experiment on its own.

Spread

This myth is common knowledge worldwide, though some recipes are more elusive than others, especially 'Dieter's Cake'.
The recipes and their existence are mostly discussed amongst moderate to high-level magical practitioners, and chefs.
They are surprisingly not studied academically, at least not by anyone who wishes to be taken seriously.

Variations & Mutation

It would be fair to say that this myth has several variants, but most of them relate to the different recipes.
Most have been found while accidentally working the aforementioned flowers, or during kitchen squabbles. Credit would normally be shared as most of these accidental findings involve too many cooks in the kitchen, but that is usually forgotten due to the appearance of an unexpected dish, which may or may not be accompanied by a shockwave.
A few of the current known recipes are:

• "Mela Berry Healing Tarts" - yes, this does require a 'fistful of butter'
• "Violet Sleeping Biscuits" - a cookie (or biscuit) that includes ingredients good for relaxing. They are said to help you sleep, or more aptly, force you to sleep minutes after consumption.
• "Shimmering Fowl" - this recipe seems to have a minor allowance for variation in the supplied meat
• "Soulsaver's Porridge" - a porridge that heals minor colds and illnesses. It has nothing to do with the soul
• "Silver Biscuits" - A 5-ingredient dish said to have been concocted by a hungry child.
• "Warrior's Tart" - A tart that bestows effects on people, for better or worse...
• "Final Flan" - A special mutation of the Warrior's Tart. It's a dessert that eats back.

Some rumored lost recipes:

• "Dieter's Cake" - a delicious, decadent cake that seems to have the property of aiding in weight loss. Has an ingredient allowance for introducing flavor... allegedly
• "Augmented Apples" - said to be similar to candied apples, this recipe is thought to have allowances for one of its ingredients, which changes the applied effect of the dish. It is an augmenting food, which bestows effects on the one who consumes it.
• "Savory Salad" - a salad, comprised entirely of leafy things, but all anyone who claims to have had this can say is that it was the tastiest green meat they've ever eaten, all the while asking what meat looks like leaves. A totally expected (and safe) spoiler
  There are no animal products in this dish (depending on the type of butter you use).

Cultural Reception

Fey recipes, when discovered, are well received by anyone who has a preference for that type of dish. This is inevitable since everyone likes food.
There are exceptions among small factions of each species, particularly those who either dislike magic or believe magic has no place in a kitchen, and amongst those who want a very thorough understanding of the cooking process of a dish.

In Literature

There are supposedly 2 cookbooks that contain a few discovered fey recipes. A list of all known fey recipes can be found in one of the original editions of Kranjax's Classification of Arcana Major, Minor, and Some Things in Between, but since the original 3 are kept under lock and key, and the sentient books don't let just anyone read them, nobody knows that the recipes are in them.

In Art

In the ruins of Razanden's Royal Castle, a tapestry was found in which a queen was bowing to a chef who was holding a plate of shining cake. This is thought to be the long-lost Dieter's Cake.
Similar tapastries and artwork can be found scattered or stuffed in the corners of the kitchens of noble houses around the world.

by Kranjax via Midjourney