Why it works: Flour and sugar 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.
Make the batter
Preheat the oven to 350°F (175°C).
Beat the powdered sugar and egg yolks until frothy.
Whip the egg whites until stiff peaks form, then fold into the yolk mixture.
Gently stir in the pastry flour.
Bake, fill and roll
Pour the batter into a shallow pan and bake for 20 minutes.
While warm, trim the edges and spread jelly over the cake.
Roll the cake up in a towel until ready to serve.
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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Flour + sugartop 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
- Whipped whites trap air, giving the sponge its light, lifted structure.
- Pastry flour
- Provides gluten-based structure that holds the thin sponge together when rolled.
- Powdered sugar
- Sweetens the batter and helps the yolks form a stable, tender crumb.
- Jelly
- Adds sweetness and moisture to the filling, and makes the rolled cake stick together.
The step that matters
Roll the cake while warm. A warm sponge is flexible, so it rolls without cracking. Once it cools, the starches and structure set and the cake splits 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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