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 ↓
Leopard CaKe
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Make the batter
Beat the egg whites until frothy.
Rub the egg yolks with butter and sugar until well combined.
Combine all ingredients, adding the flour mixed with Yeast Powder last.
Bake
Bake in a moderate oven at 350°F (175°C) until done.
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
- Egg whites
- Whipped to a froth, they add lift and a light, airy crumb to the cake.
- Egg yolks
- They add richness, moisture and tenderness, and bind the batter together.
- Butter
- Creamed with sugar, it adds fat for a tender texture and rich flavour.
- Granulated sugar
- Sweetens the cake and helps create a soft, tender crumb when creamed with butter.
- Flour
- Provides the structure that holds the cake together as it bakes.
- Yeast powder
- A leavening agent that releases gas in the batter, helping the cake rise.
The step that matters
Adding the flour mixed with Yeast Powder. Adding the leavened flour last and mixing gently keeps the batter light. Overmixing develops gluten, which can toughen the crumb and make the rise uneven.
“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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