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 ↓
Croton Sponge Cake
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the batter
Preheat the oven to 400°F (200°C).
In a mixing bowl, beat the butter and sugar together until creamy.
Add the eggs, which have been beaten separately, and mix well.
Sift the cream of tartar with the flour and add to the mixture.
Dissolve the baking soda in the milk and stir it in.
Bake
Pour the batter into a prepared baking pan and bake until golden.
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- All-purpose flour
- Forms the main structure of the cake as its proteins set during baking.
- Granulated sugar
- Sweetens the cake and, creamed with butter, helps trap air for a lighter crumb.
- Unsalted butter
- Adds richness and tenderness, and its creaming holds air in the batter.
- Large eggs
- Provide structure as they set and add moisture and richness to the crumb.
- Cream of tartar
- Acidifies the batter and stabilises the leavening reaction with baking soda.
- Baking soda
- Reacts with the acid in the batter to release gas, helping the cake rise.
The step that matters
Stirring in the baking soda dissolved in milk. Baking soda starts releasing gas as soon as it meets acid, so the batter should go into the oven promptly to keep the rise from fading before baking sets the structure.
“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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