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 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the batter
Separate the eggs and beat the whites until stiff.
In another bowl, beat the yolks and mix in the sugar until well combined.
Gradually add the flour and cold water to the yolk mixture, mixing until smooth.
Fold in the beaten egg whites gently.
Add the Cook’s Friend and mix until just combined.
Bake
Pour the batter into a greased cake pan and bake at 400°F (200°C) until golden and a toothpick comes out clean.
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 the yolks add richness and structure to the batter.
- Sugar
- Sweetens the batter and helps the yolks stay smooth and well combined.
- Flour
- Forms the cake's structure as its proteins set during baking.
- Cook’s friend
- Baking powder that releases gas in the batter, helping the cake rise.
The step that matters
Fold in the beaten egg whites gently. Egg whites hold air only while whipped, and vigorous stirring deflates them. Gentle folding keeps the trapped air in the batter so the sponge rises light instead of dense.
“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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