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 ↓
Scotch Fruit 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.
Prepare the batter
Preheat the oven to 350°F (175°C).
Cream the butter and sugar together.
Gradually add the sour milk.
Mix in the beaten yolks of the eggs.
While stirring, add the sifted flour and then fold in the whipped egg whites.
Flavor the mixture with lemon and vanilla extracts.
Layer and bake
Flour the chopped raisins, currants, and sliced citron.
In a cake pan, layer a thin layer of batter, sprinkle in some fruit, and repeat until all ingredients are used, finishing with a layer of batter on top.
Bake for 2 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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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).
-
Raisin + curranttop 10% of all pairsSmell alikelowCooked together6,180 recipes
Shared aroma: gamma-nonanolactone (coconut, creamy).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Sugar + raisintop 13% of all pairsSmell alikemoderateCooked together12,481 recipes
Shared aroma: beta-damascenone (apple, rose).
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
- Whipped whites add lift and structure, while yolks add richness and tenderness to the crumb.
- Butter
- Creamed with sugar, it traps air and adds fat for a tender, moist texture.
- Sour milk
- Its acidity reacts with the baking soda to help the cake rise and softens the crumb.
- Baking soda
- Reacts with the acidic sour milk to produce gas that leavens the cake.
- Flour
- Provides the structure that sets the cake as it bakes.
- Raisins
- Add chewy sweetness and moisture throughout the cake.
The step that matters
Folding in the whipped egg whites. Whites hold air only if they are whipped to the right stiffness and folded in gently; overmixing deflates them, leaving a denser cake with less rise.
Swap the currant
How well each one fits the dish's main ingredients (butter, sugar, flour, milk, egg, raisin, lemon):
- Vanillafits better
- Figfits better
- Blackberryfits better
- Currantthe original
Fit is the average pairing score against butter, sugar, flour, milk, egg, raisin, lemon. 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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