Why it works: Egg and sugar are a kitchen classic. They rank in the top 21% of all ingredient pairs, and cooks put them together in 122,807 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Walnut Cake
Ingredients
Directions
Prepare the cake
Prepare a rich cupcake dough and bake it in layers.
Make the icing
In a bowl, beat the egg whites until stiff.
Gradually add the powdered sugar and continue beating until well combined.
Set aside enough icing to cover the top of the cake.
Assemble and decorate
Spread the icing between each layer of the cake.
Place walnuts on top of the cake as desired.
Ice the top of the cake and decorate with walnuts.
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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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + walnuttop 23% of all pairsSmell alikemoderateCooked together6,037 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sugar + walnuttop 26% of all pairsSmell alikemoderateCooked together7,147 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg whites
- Whipped until stiff, they trap air and give the icing its light, airy volume.
- Powdered sugar
- Sweetens the icing and, with the whites, forms a smooth, stable frosting body.
- Walnuts
- Add crunch and a nutty flavour that contrasts with the soft cake and sweet icing.
- Rich cup cake dough
- Forms the layers that give the cake its structure and soft, tender crumb.
The step that matters
Beating the egg whites until stiff, then adding sugar gradually. Stiff whites hold air in a foam that gives the icing volume. Adding sugar slowly lets the foam stabilise; dumping it in can deflate the whites and leave the icing dense and runny.
Swap the walnut
How well each one fits the dish's main ingredients (egg, sugar):
- Pecansfits better
- Almondfits better
- Chestnutfits about as well
- Walnutthe original
Fit is the average pairing score against egg, sugar. Candidates are from the same food group and used in at least 100 recipes.
“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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