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 ↓
Spice Cake
Ingredients
Directions
Make the batter
Cream the butter and sugar together.
Add the beaten egg, molasses, and baking soda dissolved in sour milk.
Mix in the spices, flour, and raisins.
Bake
Pour the batter into a greased cake pan and bake until a toothpick comes out clean.
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.
Photo for illustrative purposes only · Contact us to use it
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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Sugar + molassestop 11% of all pairsSmell alikemoderateCooked together9,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Molasses + raisintop 12% of all pairsSmell alikelowCooked together3,577 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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
- Creams with sugar to trap air, giving the cake a tender, rich crumb.
- Egg
- Adds structure and binds the batter as it sets 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 to the batter.
- Flour
- Forms the main structure of the cake as its proteins set during baking.
- Molasses
- Adds moisture, deep sweetness, and browning to the crumb.
The step that matters
Dissolving the baking soda in the sour milk. Baking soda needs an acid to react and release carbon dioxide. Dissolving it fully in the sour milk before adding it spreads the reaction evenly, so the cake rises uniformly rather than leaving bitter pockets or dense spots.
Swap the raisin
How well each one fits the dish's main ingredients (egg, sugar, molasses, butter, milk, flour):
- Raisinthe original
- Vanillafits about as well
- Figfits less well
- Peachfits less well
Fit is the average pairing score against egg, sugar, molasses, butter, milk, 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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