Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Raisin 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
Preheat the oven to 350°F (175°C).
In a bowl, beat the egg whites until stiff peaks form.
In another bowl, cream together the butter and 1 ½ cups sugar.
Add the egg yolk, milk, flour, and baking powder to the butter mixture and mix well.
Gently fold in the beaten egg whites.
Pour the batter into a greased cake pan.
Make the filling
For the filling, combine 1 cup sugar, 3 egg yolks, ½ cup milk, walnut‑sized butter, 2 tablespoons flour, and raisins in a saucepan.
Cook the filling over low heat until thickened like custard.
Assemble
Once the cake is baked, fill it with the custard 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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Flour + raisintop 1% of all pairsSmell alikestrongCooked together9,075 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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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Flour + walnuttop 12% of all pairsSmell alikemoderateCooked together5,873 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Walnut + raisintop 13% of all pairsSmell alikemoderateCooked together647 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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 to stiff peaks, they trap air and lighten the batter so the cake rises.
- Butter
- Creamed with sugar, it adds richness and a tender crumb.
- Sugar
- Sweetens the cake and, creamed with butter, helps create a light texture.
- Flour
- Provides the structure that holds the cake together and thickens the custard filling.
- Baking powder
- Releases gas in the oven, helping the cake rise.
- Egg yolks
- Enrich the filling and help it thicken into a custard when cooked.
The step that matters
Cook the filling over low heat until thickened like custard. Egg yolks and flour thicken as they heat, but high heat can scramble the eggs and cause lumps or curdling. Gentle, steady heat with stirring gives a smooth custard.
Swap the walnut
How well each one fits the dish's main ingredients (egg, sugar, butter, milk, flour, raisin):
- Almondfits better
- Chestnutfits better
- Pistachiofits about as well
- Walnutthe original
Fit is the average pairing score against egg, sugar, butter, milk, flour, raisin. 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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