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
Make the batter
Separate the eggs. Beat the yolks until creamy.
Add the powdered sugar and beat together.
Beat the egg whites until very stiff and dry, then fold into the yolk mixture.
Sift in the flour and stir quickly.
Bake and roll
Line a large shallow pan with parchment paper and bake for 20 minutes.
While warm, cut off the edges, spread with jelly, and roll up.
Wrap in a towel and place in a cool place.
Cut with a sharp knife.
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
- Whipped whites give the sponge its light, airy structure, while yolks add richness.
- Powdered sugar
- Sweetens the batter and helps make it smooth and tender.
- Flour
- Provides the structure that holds the sponge together once baked.
- Jelly
- Adds sweetness and moisture to the filling inside the rolled sponge.
The step that matters
Fold the whipped whites into the yolks. Whites hold air only when beaten stiff and dry. Folding gently keeps that air in, so the sponge rises and stays light instead of deflating and turning dense.
“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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