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 ↓
Recipe for Black Bean Soup
Ingredients
Directions
Prepare the beans
Soak the black beans overnight, then drain.
Cook the soup
In a large pot, combine the beans, onion, water, chicken (or beef and bacon).
Bring to a boil, then simmer until the beans are tender and the meat is cooked.
Remove the meat, chop it, and season with pepper and salt.
Form the seasoned meat into balls, roll them in egg white, and dry them on the stove.
Strain the soup to remove the beans and add ketchup, sherry, chopped hard-boiled eggs, and the meatballs.
Serve
Serve hot.
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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Beans + walnuttop 8% of all pairsSmell alikestrongCooked together162 recipes
Shared aroma: 2,3,5-trimethylpyrazine (cocoa, roasted).
-
Onion + chickentop 8% of all pairsSmell alikemoderateCooked together17,814 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
-
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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg white
- Forms a thin coating on the meatballs that helps them hold their shape.
- Hard-boiled eggs
- Add body and richness to the soup as they are stirred in.
- Sherry
- Adds a mellow, aromatic depth to the finished soup.
The step that matters
Drying the meatballs on the stove. Meatballs rolled in egg white must dry until the coating sets; if they go into the soup wet, the coating can loosen and cloud the broth.
Swap the walnut
How well each one fits the dish's main ingredients (beans, onion, chicken, pepper, sherry, egg):
- Sesamefits better
- Chickpeafits better
- Peasfits better
- Walnutthe original
Fit is the average pairing score against beans, onion, chicken, pepper, sherry, egg. 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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