Why it works: Raisin and flour 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 ↓
Layer Fruit 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.
Prepare
Preheat the oven to 350°F (175°C).
Make the batter
In a bowl, cream together the sugar and butter.
Beat in the eggs one at a time.
Mix in the cooked raisins, sour milk, coffee, lemon juice, and lemon rind.
Add the baking soda and flour gradually, mixing well.
Stir in spices to taste.
Bake
Divide the batter into two layers 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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Raisin + flourtop 1% of all pairsSmell alikestrongCooked together9,075 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Milk + coffeetop 10% of all pairsSmell alikemoderateCooked together2,202 recipes
Shared aroma: 4-heptenal (creamy, biscuit).
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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
- Butter
- Adds fat that tenderises the crumb and carries flavour.
- Eggs
- Add structure and richness, helping the batter set as it bakes.
- Flour
- Forms the structure of the cake as its proteins set in the oven.
- Baking soda
- Reacts with the sour milk to release gas, helping the cake rise.
- Sour milk
- Its acidity activates the baking soda and adds moisture and tenderness.
- Cooked raisins
- Add moisture, sweetness and chewy fruit pieces throughout the cake.
The step that matters
Add the baking soda and flour gradually, mixing well. Baking soda needs acid from the sour milk to release gas, and it must be evenly distributed so the cake rises uniformly without pockets or uneven texture.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg, butter, raisin, milk, coffee, flour):
- Vanillafits better
- Figfits better
- Coconutfits about as well
- Lemonthe original
Fit is the average pairing score against sugar, egg, butter, raisin, milk, coffee, 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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