Why it works: Sugar and chocolate are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 15,404 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
Sponge Jelly Cake
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 400°F (200°C).
Beat the egg whites and yolks separately.
Make the batter
In a bowl, mix the sugar, flour, and baking powder.
Add the egg yolks and boiling water to the dry ingredients and mix well.
Gently fold in the beaten egg whites.
Bake and assemble
Pour the batter into jelly tins and bake until golden.
Once cooled, place jelly or chocolate frosting between the cakes.
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 + chocolatetop 13% of all pairsSmell alikemoderateCooked together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
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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 + chocolatetop 18% of all pairsSmell alikelowCooked together8,994 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
- Whites trapped with air give the sponge its light, airy structure when folded in.
- Flour
- Provides the starch and gluten network that sets the crumb once baked.
- Sugar
- Sweetens the cake and helps the batter hold air during beating.
- Baking powder
- Releases gas in the batter, helping the cake rise in the oven.
- Boiling water
- Adds moisture and helps the batter become smooth and tender.
The step that matters
Gently fold in the beaten egg whites. Egg whites hold air bubbles that make the sponge rise. Stirring vigorously deflates them, producing a dense cake, so fold gently to keep as much air as possible.
“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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