Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
English Walnut 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.
Make the batter
Preheat the oven to 350°F (175°C).
Cream the butter and powdered sugar together until light and fluffy.
Add the milk, flour, chopped walnuts, baking powder, and beaten egg whites, then mix until well combined.
Divide the batter into three layers.
Bake
Bake until golden.
Make the icing
Beat the egg whites until stiff.
Gradually add confectioners' sugar until thick.
Stir in the chopped walnuts.
Assemble
Spread over the cooled cake layers.
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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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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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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
- Flour
- Forms the cake's structure as its proteins set during baking.
- Butter
- Creaming with sugar traps air, giving the cake a light, tender crumb and rich flavour.
- Egg whites
- Add structure and lift to the batter, and whipped stiff they give the icing body.
- Baking powder
- Releases gas in the batter so the layers rise and stay light.
- Milk
- Adds moisture and hydrates the flour so the batter forms a smooth, pourable mix.
- Walnuts
- Add texture and a toasty, nutty flavour to both the cake and the icing.
The step that matters
Beat the egg whites until stiff. Beating unfolds egg white proteins and traps air, forming stable peaks. Under-beaten whites stay runny, so the sugar will not thicken the icing properly.
Swap the walnut
How well each one fits the dish's main ingredients (sugar, butter, milk, flour, egg):
- Almondfits better
- Chestnutfits about as well
- Milletfits about as well
- Walnutthe original
Fit is the average pairing score against sugar, butter, milk, flour, 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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