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.
Drain the black beans.
Make the soup
In a large pot, combine the beans, onion, water, chicken (or beef and bacon).
Bring to a boil.
Simmer until the beans are tender and the meat is cooked.
Remove the meat.
Chop the meat.
Season the meat with pepper and salt.
Form the seasoned meat into balls.
Roll the meatballs in egg white.
Dry the meatballs on the stove.
Strain the soup.
Add ketchup, sherry, chopped hard-boiled eggs, and the meatballs 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 + 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).
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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).
-
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
- Black beans
- Form the body of the soup and thicken it as they soften during simmering.
- Eggs
- Hard-boiled eggs add chopped richness and substance; egg white helps the meatballs hold together.
- Sherry
- Adds acidity and aromatic depth to the finished soup.
- Chicken
- Simmered in the pot to flavour the broth and cooks to provide the meat for the meatballs.
The step that matters
Dry the meatballs on the stove. Drying helps the egg-white coating set and firm up so the meatballs hold their shape instead of breaking apart when added to the hot soup.
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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