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 Cakes
Ingredients
Directions
The book says “a gentle oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.
Make the syrup
In a saucepan, combine the sugar and water with lemon peel and bring to a boil.
Make the batter
Whisk the eggs and egg whites in a bowl until thick and white.
Pour the hot sugar‑water mixture over the whisked eggs while continuing to whisk.
Stir in the warm, dry flour until fully combined.
Bake
Pour the mixture into two cake tins.
Bake in a cool oven at 300°F (150°C) until done.
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.
Photo for illustrative purposes only · Contact us to use it
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
- Whisked with the whites to trap air, giving the sponge its light, airy structure.
- Egg whites
- Whisked into a stiff foam that provides lift and a delicate, open crumb.
- Lump sugar
- Dissolved in water to make a syrup that sweetens the cake and adds tenderness.
- Flour
- Provides the set structure that holds the risen foam together as the cake bakes.
The step that matters
Pour the hot syrup into the whisked eggs while still whisking. Adding the hot syrup slowly while whisking keeps the egg foam from collapsing and deflating. Whisked eggs hold air only when they are beaten continuously during the addition, and that trapped air is what makes the sponge 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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