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 ↓
Jelly Roll
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Preheat the oven to 350°F (175°C).
Make the batter
Beat the egg yolks until light, then add the sugar, water, and salt.
Sift the baking powder into the flour and gradually add it to the mixture.
Fold in the egg whites gently.
Bake and roll
Pour the batter into a long shallow baking tin and bake until golden.
Turn the cake out onto a clean towel, spread with jelly, and roll it up.
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
- Whites trapped by folding give the sponge its light, airy structure.
- Sugar
- Sweetens the cake and helps the yolks whip to a light, stable texture.
- Flour
- Provides the starch and gluten that set the sponge's structure as it bakes.
- Baking powder
- Releases gas in the batter, helping the sponge rise and stay tender.
- Jelly
- Adds sweetness and moisture in the filling between the rolled layers.
The step that matters
Fold in the egg whites gently. Egg whites hold air that gives the sponge its lift. Vigorous stirring knocks that air out, so the cake bakes flat and dense and 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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