Why it works: Pepper and tomato are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Baked Kidney Beans
Ingredients
Directions
The book says “a slow oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the beans
Soak the beans overnight.
In the morning, parboil the beans with the onions.
Bake
Put the mixture into a bean pot and stir in the tomatoes, salt, sugar, and pepper.
Add the pork to the beans, ensuring water barely covers them.
Two hours before the beans are done, bring the pork to the top to brown.
Bake for about five hours at 300°F (150°C).
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 + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + porktop 10% of all pairsSmell alikemoderateCooked together18,214 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pork + tomatotop 10% of all pairsSmell alikemoderateCooked together4,843 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + oniontop 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
- Kidney beans
- Form the bulk of the dish, becoming tender and creamy during long slow baking.
- Fat salt pork
- Adds fat and savory flavor, and browns on top to enrich the beans.
- Onions
- Add sweetness and aroma as they soften and blend into the sauce.
- Canned or stewed tomatoes
- Provide acidity and liquid that body the sauce as it reduces.
- Sugar
- Adds sweetness that balances the acidity of the tomatoes.
The step that matters
Add the pork so water barely covers the beans. Too much liquid makes the beans soupy, while too little lets them dry out and scorch during the long bake. Keeping the level just at the beans' surface helps them cook evenly and form a thick sauce.
Swap the kidney beans
How well each one fits the dish's main ingredients (pepper, onion, pork, tomato, sugar):
- Beansfits better
- Black-eyed peafits better
- Sesamefits better
- Kidney beansthe original
Fit is the average pairing score against pepper, onion, pork, tomato, sugar. 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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