Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Mocha Filling
Ingredients
Directions
Beat powdered sugar, egg yolk, butter, and vanilla together until creamy.
Boil the coffee until reduced to 2 tablespoons, then add it to the mixture and mix until well combined.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Vanilla + coffeetop 9% of all pairsSmell alikemoderateCooked together1,391 recipes
Shared aroma: sotolon (curry, maple).
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Butter + vanillatop 14% of all pairsSmell alikemoderateCooked together20,050 recipes
Shared aroma: guaiacol (smoky, sweet).
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Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + coffeetop 17% of all pairsSmell alikelowCooked together4,344 recipes
Shared aroma: beta-damascenone (apple, rose).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Powdered sugar
- Sweetens the filling and dissolves smoothly into the butter for a fine, creamy texture.
- Egg yolk
- Adds richness and helps emulsify the butter and sugar into a smooth, stable mixture.
- Unsalted butter
- Provides fat for a soft, creamy body and a rich mouthfeel.
- Strong coffee
- Supplies deep coffee flavor and aroma; reducing it concentrates the flavor without adding excess liquid.
The step that matters
Reducing the coffee to 2 tablespoons. Boiling off water concentrates the coffee's flavor and aroma. Adding coffee that is still too wet can loosen the filling and dilute its mocha taste.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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