Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Swiss Roll
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the batter
Preheat the oven to 400°F (200°C).
In a bowl, beat the eggs and measure their weight to determine the amounts of flour, butter, and sugar.
Melt the butter and mix it with the sugar and eggs until smooth.
Sift in the flour and baking powder, then add the milk and mix until combined.
Bake and roll
Pour the batter into a greased baking sheet and spread evenly.
Bake for about 10‑15 minutes until golden.
Spread jam over the baked cake and roll it up carefully.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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).
Flour and butter barely smell alike, yet cooks put them together in 124,287 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
- Beaten eggs provide structure and trap air, giving the sponge its light, elastic body.
- Flour
- Provides the structure that sets the sponge once baked, allowing it to be rolled.
- Butter
- Adds fat for richness, tenderness and a soft crumb in the cake.
- Sugar
- Sweetens the cake and helps browning at the surface during baking.
- Baking powder
- Releases gas in the batter to make the cake rise and stay light.
The step that matters
Rolling the baked cake. A cake that is over-baked loses moisture and becomes brittle, so it cracks when rolled. Roll it while still warm and flexible, as cooling makes it stiff.
“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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