Why it works: Sugar and chocolate are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 15,404 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
Rolled Jelly Cake
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 the batter
Preheat the oven to 350°F (175°C).
Beat the egg yolks and gradually add the sugar.
Beat the egg whites and gently fold them into the yolk mixture.
Sift together the flour and baking powder, then slowly add to the batter.
Stir in the hot water.
Bake and roll
Line a long baking pan with buttered paper and pour in the batter to a depth of ¼ inch.
Bake for 8 to 10 minutes until done.
Remove the cake from the pan and tear off the paper.
Spread jelly or melted chocolate on the cake and roll it up.
Wrap a napkin tightly around the cake to hold its shape until cool.
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 + chocolatetop 13% of all pairsSmell alikemoderateCooked together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
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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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Flour + chocolatetop 18% of all pairsSmell alikelowCooked together8,994 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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 trap air and the yolks enrich the batter, giving the cake its light structure.
- Sugar
- Sweetens the batter and helps the yolks whip to a stable, airy foam.
- Flour
- Provides the starch and gluten that set the cake's structure as it bakes.
- Baking powder
- Releases gas during baking so the thin sponge rises and stays tender.
- Jelly or melted sweet chocolate
- Adds moisture and sweetness inside the rolled cake and helps it hold together.
The step that matters
Folding the egg whites into the yolk mixture. Folding gently keeps the air bubbles in the whites intact. Stirring or deflating them makes the batter dense and can leave the thin sponge too flat to roll without cracking.
“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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