Why it works: Chocolate and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 10,020 recipes. Both carry sotolon, which smells curry, maple. The science ↓
Chocolate Cake
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the batter
Preheat the oven to 350°F (175°C).
Beat the butter and sugar together until creamy.
In a separate bowl, beat the egg yolks and stir in the grated chocolate.
Add the chocolate mixture to the butter and sugar mixture.
Mix the ground rice and flour together, then add to the batter along with the baking powder.
Beat the egg whites until stiff and fold them into the mixture along with the vanilla extract.
Bake
Pour the batter into a tin lined with greased paper.
Bake for one hour.
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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Chocolate + vanillatop 5% of all pairsSmell alikemoderateCooked together10,020 recipes
Shared aroma: sotolon (curry, maple).
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Sugar + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Rice + vanillatop 11% of all pairsSmell alikemoderateCooked together1,352 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + vanillatop 12% of all pairsSmell alikemoderateCooked together19,241 recipes
Shared aroma: isobutyraldehyde (malty, green).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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
- Egg yolks enrich the batter, while whipped whites add air that lightens the crumb.
- Butter
- Creamed with sugar, it traps air and adds fat for a tender, rich texture.
- Flour
- Provides the starch and gluten network that gives the cake its structure.
- Grated chocolate
- Adds the chocolate flavour and fat, contributing to richness and moisture.
- Baking powder
- Releases gas during baking, helping the cake rise.
- Castor sugar
- Sweetens the cake and helps trap air when creamed with butter.
The step that matters
Folding in the whipped egg whites. Whites beaten until stiff hold air that gives the cake its lift. Overmixing when folding deflates them, leading to a dense, heavy cake.
“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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