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.
Make the batter
Beat the yolks of the eggs until light.
Gradually add the sugar and hot water.
Fold in the beaten egg whites.
Sift the flour with baking powder and salt, then fold into the mixture.
Bake
Pour into a greased pan and bake for 1 hour at 300°F (150°C).
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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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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 tenderizes its crumb by interfering with gluten development.
- Flour
- Provides the structure that sets as the cake bakes.
- Baking powder
- Releases gas during baking, helping the cake rise.
- Hot water
- Adds moisture and helps dissolve the sugar into the batter.
The step that matters
Fold in the beaten egg whites. The whites hold air bubbles that give the sponge its lift. Stirring or overmixing knocks that air out, leaving a dense cake, so fold gently with a spatula until just combined.
“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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