Why it works: Pepper and onion are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Stewed Kidney-beans
Ingredients
Directions
Prepare the beans
Pick over and wash the kidney beans.
If desired, soak the beans overnight for quicker cooking.
Cook the beans
Put the beans in a pot with 1 quart of cold water and heat gradually.
When boiling, pour in ½ cup of cold water to check the boiling.
Every 15 minutes, add another ½ cup of cold water and cook gently until tender.
Season and serve
For extra flavor, fry a chopped onion in the butter before adding it to the beans.
Drain the beans and add 2 tablespoons of butter, ½ teaspoon of salt, and ¼ teaspoon of pepper.
Heat the mixture and 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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Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Kidney beans + oniontop 15% of all pairsSmell alikemoderateCooked together1,050 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Kidney beans + buttertop 22% of all pairsSmell alikemoderateCooked together186 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
- Dried red kidney beans
- Provide the main body and starchy texture of the stew once cooked until tender.
- Butter
- Adds richness and a silky mouthfeel to the cooked beans.
The step that matters
Cooking gently until tender. Beans need a gentle simmer rather than a hard boil, which can break them apart. Adding water in measured amounts keeps the level up so the beans stay submerged and cook evenly until soft.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (kidney beans, butter, pepper):
- Capsicumfits better
- Potatofits about as well
- Tomatofits about as well
- Onionthe original
Fit is the average pairing score against kidney beans, butter, pepper. 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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