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 moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the eggs
Preheat the oven to 350°F (175°C).
Separate the eggs, placing the yolks in a mixing bowl and the whites in a deep bowl.
Add a pinch of salt to the egg whites and beat until stiff enough to invert the bowl.
Gradually add ½ cup sugar to the egg whites while beating, then set aside in a cool place.
Beat the yolks until thick and lemon-colored, about 10 minutes.
Slowly add the remaining ½ cup sugar to the yolks, then stir in the grated lemon peel and lemon juice.
Make the batter
Gently fold the egg whites into the yolk mixture until blended.
Add half of the sifted flour and fold it in quickly, then add the remaining flour and fold until just combined.
Pour the batter into a large tube pan or shallow tin.
Bake
Bake for 50 to 60 minutes, avoiding opening the oven door for the first 20 minutes.
The cake is done when it starts to shrink from the pan.
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 and yolks provide the air and structure that lift the cake.
- Fine granulated sugar
- Sweetens the cake and helps stabilise the whipped egg whites.
- Pastry flour
- Provides a light, tender crumb structure once set by baking.
- Lemon juice
- Adds acidity and bright lemon flavour to the batter.
The step that matters
Folding the egg whites into the yolks. Folding gently keeps the air trapped in the whites. Stirring or deflating them makes the cake dense and reduces its rise.
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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