Why it works: Beans and onion match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 5,242 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Bean Soup
Ingredients
Directions
Prepare
Pick over the beans, discarding any imperfect ones, then wash them.
Cook
Boil the beans in 2 quarts of cold water for 15 to 20 minutes.
Remove from heat, drain the water, and add the same amount of fresh cold water.
Add the washed salt pork and the onion.
Cook slowly for 3 hours, adding more water if necessary.
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 + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + porktop 10% of all pairsSmell alikemoderateCooked together18,214 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beans + porktop 11% of all pairsSmell alikemoderateCooked together2,000 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beans
- Form the body of the soup and thicken it as their starch softens during long cooking.
- Salt pork
- Adds fat and savory flavor that carries through the broth as it cooks.
- Onion
- Adds aromatic sweetness that builds the savory base of the soup.
The step that matters
Discarding the first water after parboiling. Boiling beans first and then draining removes compounds that cause gas and bitterness, and the fresh water gives a cleaner broth. Skipping the change of water can leave the soup harsher in flavor.
Swap the beans
How well each one fits the dish's main ingredients (onion, pork):
- Sesamefits better
- Beansthe original
- Soybeanfits about as well
- Peanutfits about as well
Fit is the average pairing score against onion, pork. 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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