Why it works: Chocolate and coffee are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 1,497 recipes. Both carry 2,3-butanedione, which smells buttery, creamy. The science ↓
Coffee Icing
Ingredients
Directions
Cream together the powdered sugar, butter, and chocolate.
Add the boiling coffee or boiling water and mix until smooth.
Flavor as desired.
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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Chocolate + coffeetop 5% of all pairsSmell alikemoderateCooked together1,497 recipes
Shared aroma: 2,3-butanedione (buttery, creamy).
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Sugar + chocolatetop 13% of all pairsSmell alikemoderateCooked together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + chocolatetop 16% of all pairsSmell alikemoderateCooked together10,543 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Sugar + coffeetop 17% of all pairsSmell alikelowCooked together4,344 recipes
Shared aroma: beta-damascenone (apple, rose).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Powdered sugar
- Provides sweetness and bulk, dissolving smoothly into the liquid to form the frosting body.
- Butter
- Adds fat for a smooth, creamy texture and a rich mouthfeel.
- Chocolate
- Adds cocoa flavor and fat, giving the frosting its color and depth.
- Boiling coffee or boiling water
- Adds liquid that loosens the sugar and butter into a smooth, spreadable frosting.
The step that matters
Add the boiling liquid gradually and mix until smooth. Hot liquid melts the butter and dissolves the sugar, so adding it too fast can make the frosting thin and runny. Mixing until smooth ensures the sugar fully dissolves, avoiding a gritty texture.
“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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