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 ↓
Black Bean Puree
Ingredients
Directions
Prepare the beans
Wash the beans and soak them overnight.
Cook and sieve
Simmer the beans in hot water until soft, about 3 to 4 hours.
In the last hour of cooking, add the onion with cloves.
Once soft, rub the mixture through a sieve.
Finish and serve
Bind the puree with flour and butter.
Place the lemon slices in a tureen and strain the soup through them.
Grate the hard-cooked egg on top just 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 + clovetop 9% of all pairsSmell alikestrongCooked together908 recipes
Shared aroma: 2-heptanol (bitter, floral).
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Clove + lemontop 10% of all pairsSmell alikestrongCooked together8,150 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Beans + flourtop 11% of all pairsSmell alikemoderateCooked together2,080 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Beans + lemontop 12% of all pairsSmell alikestrongCooked together1,474 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
- Black beans
- Form the main body of the puree and thicken it when rubbed through a sieve.
- Flour
- Thickens the puree by binding it with butter into a smooth body.
- Butter
- Adds richness and a smooth mouthfeel to the bound puree.
- Onion
- Adds savoury aroma and flavour to the beans as they simmer.
The step that matters
Rub the mixture through a sieve. Pushing cooked beans through a sieve breaks down their cell walls and skins, giving a smooth puree; leftover skins or lumps spoil the texture.
Swap the clove
How well each one fits the dish's main ingredients (beans, sauce, onion, butter, flour, egg, lemon):
- Capersfits better
- Parsleyfits better
- Tarragonfits better
- Clovethe original
Fit is the average pairing score against beans, sauce, onion, butter, flour, egg, lemon. 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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