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 says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 350°F (175°C).
Make the batter
Beat the egg yolks and whites separately until fluffy.
Mix in the sugar, water, flour, and baking powder until smooth.
Pour the batter into a square shallow tin and bake until golden.
Roll and set
Turn the cake onto a towel, bottom side up.
Spread jelly over the cake and roll it up using the towel.
Leave it wrapped in the towel to set.
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 yolks and whites trap air, giving the sponge its light, airy structure.
- Sugar
- Sweetens the cake and helps the batter hold its structure while baking.
- All-purpose flour
- Forms the sponge's main structure once it sets in the oven.
- Baking powder
- Releases gas in the batter, helping the cake rise and stay tender.
- Jelly
- Adds sweetness and fruity moisture filling the rolled sponge.
The step that matters
Roll the cake while it is still warm. A warm sponge is flexible, so it can be rolled without cracking. Once it cools, it stiffens and tends to crack along the rolled edge.
“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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