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 ↓
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
Cream together the sugar and butter.
Add the beaten egg whites and mix well.
In a separate bowl, combine the flour, cream of tartar, and baking soda.
Gradually add the dry ingredients to the creamed mixture.
Stir in the sweet milk until well combined.
Fold in the chopped walnuts.
Bake
Pour the batter into a greased cake pan and bake at 350°F (175°C) until a toothpick comes out clean.
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 + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Sugar + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, 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 + walnuttop 12% of all pairsSmell alikemoderateCooked together5,873 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Egg whites
- Beaten whites trap air, giving the cake lift and a light, open crumb.
- Flour
- Forms the structure that holds the cake together as it bakes.
- Butter
- Creamed with the sugar, it adds richness and tenderness to the crumb.
- Cream of tartar
- Acidifies the batter so baking soda reacts properly and helps stabilize the foam.
- Baking soda
- Reacts with the acid in the batter to produce gas that helps the cake rise.
- Walnuts
- Add crunch and a nutty flavor that contrasts with the soft crumb.
The step that matters
Folding in the walnuts. Stirring too hard after the egg whites are added can deflate the batter's trapped air, leading to a dense cake. Fold gently until just combined.
Swap the walnut
How well each one fits the dish's main ingredients (sugar, egg, butter, flour, milk, cream):
- Almondfits better
- Pistachiofits about as well
- Chestnutfits about as well
- Walnutthe original
Fit is the average pairing score against sugar, egg, butter, flour, milk, cream. 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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