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 ↓
Roll Jelly 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 egg whites and yolks separately.
Combine the sugar, flour, baking powder, and salt in a mixing bowl.
Add the beaten egg yolks to the dry ingredients and mix well.
Gently fold in the beaten egg whites.
Bake and roll
Spread the batter evenly on long biscuit tins.
Bake until golden brown.
While warm, spread jelly on the underside and roll the cake.
Wrap the rolled cake in clean paper and tie with string to maintain its shape.
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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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Flour and egg 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 beating provide air and lift, while yolks add richness and structure to the batter.
- Flour
- Forms the gluten network that gives the sponge its structure so it can be rolled without cracking.
- Sugar
- Sweetens the cake and helps it brown during baking.
- Baking powder
- Releases gas during baking so the thin sponge rises and stays light.
- Jelly
- Adds sweetness, moisture and flavor to the filling between the rolled layers.
The step that matters
Folding in the beaten egg whites. Stirring instead of folding knocks out the air trapped in the whites, so the sponge bakes flat and dense rather than light and rollable.
“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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