Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓
Chocolate Icing
Ingredients
Directions
Make the icing
In a saucepan, combine grated chocolate, brown sugar, butter, and milk.
Boil gently while stirring to prevent burning.
Cook until the mixture thickens, then add vanilla extract.
If the icing becomes too thick, add 2 tablespoons of milk and heat again to mix.
Finish and fill
Cool the icing and spread it between layers of cake.
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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Milk + vanillatop 5% of all pairsSmell alikemoderateCooked together19,187 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Chocolate + vanillatop 5% of all pairsSmell alikemoderateCooked together10,020 recipes
Shared aroma: sotolon (curry, maple).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Chocolate + sugartop 13% of all pairsSmell alikemoderateCooked together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
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
- German sweet chocolate
- Provides the chocolate flavour and, once melted and cooled, the body of the icing.
- Brown sugar
- Adds sweetness and a caramel note, and helps the icing set smooth and glossy.
- Butter
- Adds fat for richness and a smooth, spreadable texture as the icing cools.
- Milk
- Loosens the mixture so the sugar and chocolate combine and the icing can be spread.
The step that matters
Boil gently while stirring. Sugar-and-milk mixtures scorch easily on direct heat. Gentle boiling with constant stirring prevents the bottom from burning and keeps the sugar from crystallising unevenly.
“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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