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 ↓
Plain Sponge Cake
Ingredients
Directions
Make the batter
Beat the yolks of the eggs with the powdered sugar until well combined.
Gradually stir in 1 cup of sifted flour.
Beat the egg whites to stiff peaks and fold them into the mixture.
In a separate bowl, mix 1 cup of sifted flour with 2 teaspoons of baking powder, then fold this into the batter.
Slowly stir in the boiling water a little at a time.
Add salt and do not add more flour, even if the mixture seems thin.
Bake
Pour the batter into shallow tins and bake.
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
- Egg whites
- Beaten to stiff peaks, they trap air that lifts the sponge.
- Egg yolks
- Add richness and fat, giving a tender crumb and colour.
- Flour
- Forms the gluten network that gives the cake its structure.
- Baking powder
- Releases gas in the batter, helping the cake rise in the oven.
- Powdered sugar
- Sweetens the batter and softens the crumb as it dissolves.
- Boiling water
- Adds moisture and helps the batter bloom into a lighter texture.
The step that matters
Do not add more flour when the batter seems thin. Extra flour develops more gluten, making the sponge tough and dense. A thin-looking batter is normal here and rises well once baked.
“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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