Why it works: Beans and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 4,733 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Plain Bean Soup
Ingredients
Directions
Cook the beans
Place the beans in a kettle with the cold water.
Bring to a boil, then add the baking soda.
Cook until the beans fall apart, adding hot water as needed.
Season and serve
Season with salt, pepper, and butter or fat pork if desired.
Strain the soup through a colander or serve with the beans included.
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 + peppertop 11% of all pairsSmell alikemoderateCooked together4,733 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beans + buttertop 19% of all pairsSmell alikemoderateCooked together2,799 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Navy or marrowfat beans
- Break down during long cooking to give the soup its body and thickness.
- Baking soda
- Raises the pH of the cooking water, helping the beans soften faster.
- Butter or fat pork
- Adds richness and a silky mouthfeel to the finished soup.
The step that matters
Cook until the beans fall apart, adding hot water as needed. Beans need long, steady simmering to fully soften, and adding cold water would stall the cooking and toughen the skins. Keeping the liquid hot maintains an even cook and a smooth texture.
Swap the beans
How well each one fits the dish's main ingredients (pepper, butter):
- Walnutfits about as well
- Black-eyed peafits about as well
- Almondfits about as well
- Beansthe original
Fit is the average pairing score against pepper, butter. 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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