Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Jelly Roll
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
Preheat the oven to 400°F (200°C).
Make the batter
Beat the eggs and mix in the sugar.
Add the flour, milk, and baking powder; mix until smooth.
Spread the batter very thinly in the pans.
Bake and roll
Bake until lightly golden, but do not overbake.
If the edges are hard, trim them with a sharp knife before rolling.
While hot, spread jelly over the cake, roll it up, and wrap in napkins to maintain 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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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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 + milktop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sugar + milktop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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 eggs trap air and provide the structure that holds the thin sponge together.
- All-purpose flour
- Flour forms the gluten and starch network that gives the cake its body for rolling.
- Sugar
- Sugar sweetens the sponge and helps it brown lightly and stay tender.
- Baking powder
- Baking powder releases gas in the oven, helping the thin batter rise and stay light.
The step that matters
Rolling while hot. Baked sponge is pliable only while warm; once it cools, the starches set and the cake cracks when rolled. Rolling it hot with the jelly, wrapped in napkins, lets it set in a curl.
“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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