Why it works: Onion and beans 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 ↓
Brittany Beans
Ingredients
Directions
Prepare the onions
Scald and drain the sliced onions.
Fry the onions in butter until pale brown.
Make the stew
Sprinkle flour, pepper, and salt over the onions and toss for 5 minutes.
Add stock and stew for about 20 minutes, stirring frequently.
Add well-cooked haricot beans and butter, toss together, and serve.
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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Onion + beanstop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + beanstop 11% of all pairsSmell alikemoderateCooked together4,733 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Flour + beanstop 11% of all pairsSmell alikemoderateCooked together2,080 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Soften and sweeten as they fry, forming the base flavor of the dish.
- Flour
- Thickens the stock into a smooth, lightly bodied sauce as it cooks.
- Stock
- Forms the liquid that the beans and onions simmer in, carrying flavor.
- Haricot beans
- Provide the main body and starchy texture of the dish.
- Butter
- Adds richness and aroma to the frying onions and finished beans.
The step that matters
Frying the onions until pale brown. Browning builds sweetness and flavor through caramelization, but over-browning turns onions bitter. Stop at pale brown so the dish stays mild and sweet.
Swap the onion
How well each one fits the dish's main ingredients (butter, flour, pepper, beans):
- Okrafits better
- Sweet potatofits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against butter, flour, pepper, beans. 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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