Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Bean Soup
Ingredients
Directions
Prepare
Soak the beans overnight in lukewarm water.
In the morning, place the soaked beans in a pot with the cold water.
Cook
Boil for 3-4 hours.
Add celery, onions, and sliced potatoes.
Simmer until the vegetables are tender.
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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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Celery + carawaytop 4% of all pairsSmell alikestrongCooked together73 recipes
Shared aroma: myristicin (spice, warm).
-
Beans + potatotop 5% of all pairsSmell alikestrongCooked together655 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Beans + celerytop 6% of all pairsSmell alikestrongCooked together1,159 recipes
Shared aroma: 2-methoxy-4-vinylphenol (clove, smoky).
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Celery + potatotop 7% of all pairsSmell alikemoderateCooked together2,047 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- French beans
- Form the body of the soup and thicken it as they break down during long cooking.
- Potatoes
- Add starch that softens the broth and gives the soup body.
- Celery
- Adds savory aroma and mild flavor to the broth.
The step that matters
Simmer until the vegetables are tender. Potatoes and celery need enough time in the hot liquid for starch to fully soften. Adding them too early or stopping too soon leaves a firm, uneven texture.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (beans, celery, potato, caraway):
- Carrotfits better
- Beetrootfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against beans, celery, potato, caraway. 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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