Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. 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.
Prepare the batter
Preheat the oven to 300°F (150°C).
Separate the egg whites from the yolks and place the yolks in a mixing bowl.
Beat the yolks until creamy, then gradually add the sugar and lemon juice.
In a separate bowl, beat the egg whites until stiff.
Sift the salt into the flour.
Fold and bake
Add one-fourth of the egg whites to the yolk mixture and fold in half of the flour.
Add another fourth of the egg whites and fold in, then sift in the remaining flour.
Fold in the rest of the egg whites gently.
Pour the batter into a prepared pan and bake for about 30 minutes, or until the cake pulls away from the sides of the pan.
For a sugary top, sprinkle a little sugar over the batter before baking.
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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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
Egg and flour barely smell alike, yet cooks put them together in 106,462 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 whites trap air for lift, and yolks add richness and structure to the batter.
- Sugar
- Sweetens the cake and helps stabilise the yolks and whites during mixing.
- Flour
- Provides the structure that holds the cake together as it bakes.
- Lemon juice
- Adds a touch of acidity that brightens flavour and helps stabilise the beaten eggs.
The step that matters
Folding the egg whites into the batter. Whites hold air only when beaten to stiff peaks, and deflating them by stirring instead of gently folding loses the lift that gives a sponge its light texture.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar, flour):
- Raisinfits better
- Vanillafits better
- Lemonthe original
- Figfits about as well
Fit is the average pairing score against egg, sugar, flour. 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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