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 ↓
Mixed Layer Cake
Ingredients
Directions
Make the batter
Cream the powdered sugar and butter together.
Add the milk and flavoring, mixing thoroughly.
Sift the baking powder and flour together.
Mix the sifted baking powder and flour lightly into the batter.
Divide the batter into two equal parts.
Prepare the two batters
Beat the egg whites until stiff.
Fold the stiff egg whites into one part of the batter.
Beat the egg yolks well.
Mix the beaten egg yolks into the other part of the batter.
Bake and assemble
Bake the batter in layer cake tins until golden.
Once cooled, layer with your choice of icing or filling.
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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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).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 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
- Eggs
- Whites trapped by beating add lift and an airy structure, while yolks add richness and tenderness.
- Flour
- Provides the main structure that holds the cake together as it sets in the oven.
- Baking powder
- Releases gas when heated, helping the layers rise and become light.
- Butter
- Creamed with sugar to trap air and add fat for a tender crumb and flavor.
- Powdered sugar
- Sweetens the batter and, creamed with butter, helps create a fine, even texture.
- Milk
- Adds moisture and hydrates the flour so the batter forms a smooth, workable mix.
The step that matters
Folding in the stiff egg whites. Stirring too hard or too long knocks out the air beaten into the whites, so the layer rises less and turns dense. Fold gently with a spatula, cutting through and turning the batter until just combined.
“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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