Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Milk Frosting
Ingredients
Directions
Make the frosting base
Melt the butter in a saucepan.
Add the sugar and milk, then stir gently until the sugar melts.
Boil without stirring for 12 minutes, then remove from heat.
Beat until thick.
Add flavoring.
Whip the egg whites
In a separate bowl, beat the egg whites, powdered sugar, and cornstarch until stiff.
Frost the cake
Spread immediately over the cake.
Frost the cake while it is still hot.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sugar + milktop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and milk barely smell alike, yet cooks put them together in 77,875 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
- Sugar
- Sweetens the frosting and, as it cooks, helps set its texture.
- Egg whites
- Whip into a foam that gives the frosting lightness and structure.
- Milk
- Adds moisture and dairy richness to the sugar syrup.
- Butter
- Adds fat for richness and a smoother mouthfeel.
- Cornstarch
- Stabilizes the whipped egg whites so they hold their shape.
The step that matters
Boil without stirring for 12 minutes. Stirring during boiling can cause sugar crystals to form, leaving the frosting grainy. Boiling the syrup to the right concentration lets it set properly once beaten.
“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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