Why it works: Beans and tomato match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 2,713 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Bean Soup
Ingredients
Directions
Prepare
Use leftover beans from dinner.
Cook the tomatoes, stock, parsley, and beans until tender.
Make the soup
Cook the onions in butter until golden brown, then add the flour.
Strain the tomatoes and beans through a sieve, pushing all the pulp through and discarding the skins and seeds.
Reheat the mixture, and when steaming, add the onion, butter, and flour mixture.
Season with salt and pepper to taste before serving.
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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Beans + tomatotop 1% of all pairsSmell alikestrongCooked together2,713 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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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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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beans + parsleytop 8% of all pairsSmell alikestrongCooked together1,376 recipes
Shared aroma: linalool (floral, citrus).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beans or peas
- Form the body of the soup and thicken it as they break down into the pulp.
- Tomatoes
- Add acidity and body, and their pulp gives the soup its color and flavor.
- Butter
- Carries the onion flavor and helps the onion brown for a richer taste.
- Flour
- Cooked with the butter and onion, it thickens the soup as it is added at the end.
The step that matters
Cook the onions in butter until golden brown, then add the flour. Browning the onions builds sweet, savory flavor, while cooking the flour briefly in the butter prevents raw starch taste and lumps when it is stirred into the hot soup.
Swap the onion
How well each one fits the dish's main ingredients (beans, parsley, tomato, butter, flour, pepper):
- Okrafits better
- Carrotfits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against beans, parsley, tomato, butter, flour, 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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