Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Sponge Cake
Ingredients
Directions
The book says “a slow oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.
Make the batter
Beat the egg yolks until thick.
Slowly add ½ cup of sugar, then the milk, and the remaining sugar; beat well.
Sift the baking powder with the flour, then add the flour and salt.
Fold in the egg whites beaten stiff.
Bake
Bake in a slow oven at 300°F (150°C) for 45 to 60 minutes.
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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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Lemon + milktop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Lemon + flourtop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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
- Eggs
- Whipped yolks and whites trap air, giving the cake its light, airy structure.
- Flour
- Its proteins set during baking, forming the cake's main structure.
- Sugar
- Adds sweetness and helps keep the crumb tender and moist.
- Milk
- Adds moisture and liquid so the flour hydrates and the batter flows.
- Baking powder
- Releases gas in the batter, helping the cake rise in the oven.
- Lemon juice
- Adds acidity that brightens the flavour and balances the sweetness.
The step that matters
Folding in the egg whites. Whites beaten stiff hold a fragile foam that gives the cake its lift. Stirring vigorously or overmixing knocks out that air, so the cake bakes up dense and flat. Fold gently, just until no white streaks remain.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar, flour, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against egg, sugar, flour, milk. 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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