Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Walnut Cake
Ingredients
Directions
The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.
Make the batter
Preheat the oven to 300°F (150°C).
Cream the butter and sugar together until light and fluffy.
Add the milk and flour.
Mix in the baking powder.
Beat the egg whites until stiff.
Fold the egg whites into the mixture.
Dredge the raisins and walnuts in a little flour.
Stir the raisins and walnuts into the batter.
Pour the batter into a greased cake pan.
Bake until golden.
Make the icing and finish
Beat the egg yolks with sugar until thick.
Spread the icing on the hot cake.
Top the icing with walnuts.
Return the cake to the oven until the icing is set.
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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Flour + raisintop 1% of all pairsSmell alikestrongCooked together9,075 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + walnuttop 12% of all pairsSmell alikemoderateCooked together5,873 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Raisin + walnuttop 13% of all pairsSmell alikemoderateCooked together647 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Butter and flour 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
- Whites trapped by beating give the cake lift, and yolks add richness and structure.
- Butter
- Creamed with sugar, it traps air and adds tenderness and richness.
- Flour
- Its proteins set during baking, forming the cake's structure.
- Sugar
- Sweetens the cake, helps tenderize it, and aids browning.
- Baking powder
- Releases gas in the batter, helping the cake rise.
- Milk
- Adds moisture, loosening the batter and keeping the crumb soft.
The step that matters
Fold the egg whites into the mixture. Beaten egg whites hold air that makes the cake light. Folding gently, rather than stirring, keeps that air from collapsing and leaving a dense cake.
Swap the walnut
How well each one fits the dish's main ingredients (butter, sugar, milk, flour, raisin, egg):
- Almondfits better
- Chestnutfits better
- Pistachiofits about as well
- Walnutthe original
Fit is the average pairing score against butter, sugar, milk, flour, raisin, egg. 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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