Why it works: Sugar and cream are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓
Roll Sponge Cake
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the batter
Preheat the oven to 400°F (200°C).
In a bowl, beat the eggs and sugar until light and fluffy.
Sift together the flour, cream of tartar, and baking soda.
Gently fold the dry ingredients into the egg mixture.
Bake and roll
Spread the batter in thin sheets on a baking tray.
Bake until lightly golden.
Spread jelly over the cake while it is still hot.
Roll the cake up carefully and let it cool.
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 + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + creamtop 18% of all pairsSmell alikemoderateCooked together29,399 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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 into foam, they trap air that gives the sponge its light structure.
- Sugar
- Beaten with the eggs to stabilise the foam and add sweetness and tender texture.
- Flour
- Provides the starch and gluten network that sets the sponge once baked.
- Baking soda
- Reacts with the acidic cream of tartar to release gas, helping the cake rise.
- Cream of tartar
- Acidic, it reacts with the baking soda to produce lift and helps stabilise the egg foam.
The step that matters
Gently fold the dry ingredients into the egg mixture. Folding keeps the air trapped in the whipped eggs. Stirring or overmixing knocks out that air and gluten develops, leaving a dense, tough roll that may crack when rolled.
“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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