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 says “a moderately quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the cake
Preheat the oven to 400°F (200°C).
Cream together the butter and sugar until well mixed.
Beat the egg whites to a stiff froth and fold into the mixture.
Add the milk, flour, and baking powder, mixing until smooth.
Pour the batter into prepared pans and bake until golden.
Let the cake cool almost completely before adding the caramel.
Make the caramel and assemble
For the caramel, combine brown sugar, butter, and enough cream or milk in a saucepan.
Boil without stirring until it thickens when tested in cold water.
Allow the caramel to cool slightly before spreading it between the layers and on top of the 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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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
- Butter
- Adds richness and tenderness, and helps give the crumb its structure when creamed with sugar.
- Egg whites
- Whipped to a stiff froth, they lighten the batter and add structure as the cake bakes.
- Flour
- Provides the main structure that holds the cake together as it bakes.
- Baking powder
- Releases gas in the batter, helping the cake rise and turn light.
- Brown sugar
- Forms the base of the caramel, giving it its deep, molasses-like flavour and sweetness.
The step that matters
Boiling the caramel without stirring. Stirring while the sugar syrup boils can make it crystallise, leaving a grainy caramel. Cooking it undisturbed until it thickens in cold water lets the sugar reach the right concentration for a smooth, spreadable filling.
Swap the walnut
How well each one fits the dish's main ingredients (butter, sugar, egg, milk, flour, cream):
- Almondfits better
- Pistachiofits about as well
- Chestnutfits about as well
- Walnutthe original
Fit is the average pairing score against butter, sugar, egg, 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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