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 ↓
Caramel Cake
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Make the batter
Combine the egg white, sugar, and melted butter in a bowl.
Stir in the milk, flour, and baking powder until well mixed.
Divide the batter into three layers.
Bake the layers at 350°F (175°C) until golden.
Make the caramel filling
Brown the walnut-sized piece of butter in a saucepan.
Add the brown sugar and sweet cream to the butter.
Boil the mixture until it reaches a hair-like consistency.
Assemble
Spread the caramel filling on top and between the baked layers.
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 + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Sugar + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + walnuttop 12% of all pairsSmell alikemoderateCooked together5,873 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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
- Egg white
- Provides structure and helps the batter set as it bakes.
- Flour
- Forms the structure of the cake crumb as it bakes.
- Baking powder
- Releases gas that makes the layers rise and turn light.
- Brown sugar
- Forms the base of the caramel, adding moisture and deep flavour.
- Sweet cream
- Adds fat and richness to the caramel filling.
The step that matters
Boiling the caramel to a hair-like consistency. Sugar and cream boiled too briefly stay thin and runny, while boiled too long they harden or turn grainy as the sugar crystallises. Watching the mixture closely lets it reach the right thickness to spread and set.
Swap the walnut
How well each one fits the dish's main ingredients (egg, sugar, butter, milk, flour, cream):
- Almondfits better
- Pistachiofits about as well
- Chestnutfits about as well
- Walnutthe original
Fit is the average pairing score against egg, sugar, butter, milk, flour, cream. Candidates are from the same food group and used in at least 100 recipes.
“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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