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 ↓
Swiss Roll
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the batter
Weigh the eggs and use the same weight in sugar and half that weight in flour.
In a bowl, mix the sugar with the egg yolks and stir for 10 minutes until thick and smooth.
Whip the egg whites with a pinch of salt until stiff peaks form.
Gently fold the whipped egg whites and flour into the yolk mixture.
Pour the batter into a greased flat baking tin and spread it thinly.
Bake and roll
Bake in a preheated oven at 400°F (200°C) for 8 minutes.
Dust a sheet of paper with sugar, turn the baked roll onto it, and quickly spread jam over the surface.
Roll the cake up tightly while it's still warm to prevent breaking.
Serve
Slice and serve cold.
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 and yolks trap air and build the sponge's light, structured crumb.
- Sugar
- Sweetens the sponge and helps stabilise the whipped egg foam.
- All-purpose flour
- Provides a small amount of structure so the thin sponge holds together when rolled.
- Jam
- Adds moisture and sweetness inside the roll and helps it stay supple.
The step that matters
Roll the cake while it is still warm. A warm sponge is flexible, so rolling it early prevents cracking. Once cooled, the structure sets and tears more easily when bent.
“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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