Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Good Plum Cakes
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
Beat the butter to a cream.
Add the powdered sugar and beat until white and smooth.
Separate the eggs, beating the yolks and whites separately.
Beat the egg whites to stiff froth.
Mix the yolks into the butter mixture, then add the beaten whites.
Gently fold in the flour and currants without overmixing.
Rest and bake
Let the mixture stand in a cold place for 2 hours.
Bake in a preheated oven at 350°F (175°C) for about 1.5 hours.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 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).
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Butter + curranttop 17% of all pairsSmell alikemoderateCooked together7,856 recipes
Shared aroma: isoamyl acetate (banana, pear).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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
- Butter
- Creaming with sugar traps air and gives the cake a rich, tender crumb.
- Eggs
- Yolks add richness and emulsify the batter, while whipped whites trap air for lift and structure.
- Flour
- Its proteins and starch set during baking to give the cake its structure.
- Powdered sugar
- Dissolves easily into the butter, adding sweetness and helping create a smooth, light batter.
- Currants
- Add sweetness and chewy fruit pockets throughout the cake.
The step that matters
Folding in the flour and currants. Gentle folding keeps the air from the whipped whites. Overmixing develops gluten in the flour, which makes the cake dense and tough.
Swap the currant
How well each one fits the dish's main ingredients (butter, sugar, egg, flour):
- Raisinfits better
- Vanillafits better
- Figfits better
- Currantthe original
Fit is the average pairing score against butter, sugar, egg, flour. 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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