Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
A Good Sponge Cake
Ingredients
Directions
Make the batter
Separate the whites and yolks of four eggs.
When the whites are stiff enough to remain in the bowl when inverted, beat into them one-half cup granulated sugar.
Beat the yolks, add another half cup granulated sugar, and beat for five minutes.
Add the juice and grated rind of one lemon to the yolks.
Beat the yolks and whites together well.
Add one cup of flour and stir it into the mixture with a light turn of a wooden spoon, avoiding further beating.
Bake
Just before putting in the oven, sprinkle about a tablespoon of granulated sugar on top through a sifter.
Bake for twenty-five minutes in a moderate oven.
Nutrition, whole recipe (rough)
What these numbers assume: 3 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Egg | 1 large egg (50g) | 78 |
| Sugar | 1 tbsp (12.5g) granulated | 49 |
| Lemon | juice of 1 lemon (48ml) | 12 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
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. See the original page.
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.
-
Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
-
Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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
- Whites trap air when beaten, giving the cake its light, airy structure, while yolks add richness.
- Sugar
- Sweetens the cake and helps stabilise the beaten egg whites.
- Lemon
- Adds acidity and aroma from the juice and grated rind.
- Flour (in the method)
- Provides the structure that sets the cake once baked.
The step that matters
Folding in the flour. Stirring in the flour gently with a light turn of the spoon keeps the air trapped in the beaten whites. Further beating would deflate the batter and produce a denser cake.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against sugar, egg. 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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