Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Bean Soup
Ingredients
Directions
Boil the beans in water until soft.
In a separate pan, fry the onions in butter until golden.
Add the fried onions to the beans.
Stir in the milk and a lump of butter.
Season with pepper and coarse sea salt to taste.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Beans + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beans + peppertop 11% of all pairsSmell alikemoderateCooked together4,733 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Small white beans
- Provide the main body and starchy texture once softened by boiling.
- Milk
- Adds creaminess and richness, giving the soup a smooth, mellow body.
- Onions
- Add sweetness and savoury depth when fried golden in butter.
- Butter
- Carries flavour when frying the onions and adds richness at the end.
The step that matters
Frying the onions until golden. Onions cooked slowly in fat turn sweet and savoury through browning, while pale or burnt onions taste flat or bitter. Taking them to a light golden colour builds flavour that carries through the whole soup.
Swap the beans
How well each one fits the dish's main ingredients (milk, onion, butter, pepper):
- Beansthe original
- Sesamefits about as well
- Peanutfits about as well
- Soybeanfits about as well
Fit is the average pairing score against milk, onion, butter, pepper. 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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