Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Haricot Beans
Ingredients
Directions
Prepare
Soak the haricot beans overnight in cold water.
Cook
Put the beans into boiling water with salt, bacon or dripping, and onion.
Boil gently for 3 to 4 hours until tender.
Finish and serve
Drain the beans well and add pepper, salt, and butter, then shake over the heat for 1 to 2 minutes.
Sprinkle with chopped parsley 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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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Beans + oniontop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beans + parsleytop 8% of all pairsSmell alikestrongCooked together1,376 recipes
Shared aroma: linalool (floral, citrus).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Beans + peppertop 11% of all pairsSmell alikemoderateCooked together4,733 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
- Haricot beans
- Form the main body of the dish, becoming soft and tender after long soaking and simmering.
- Fat bacon or dripping
- Adds fat and savoury flavour to the cooking water as the beans simmer.
- Butter
- Adds richness and a glossy coating to the drained beans.
- Onion
- Contributes savoury aroma to the cooking liquid as it simmers.
The step that matters
Boil gently for 3 to 4 hours until tender. Beans need a long, gentle simmer to soften fully. Rapid boiling can break skins and leave the beans uneven, while adding salt before cooking can toughen skins.
Swap the parsley
The recipe marks parsley as optional. How well each one fits the dish's main ingredients (beans, onion, pepper, butter):
- Garlicfits about as well
- Parsleythe original
- Cuminfits about as well
- Thymefits about as well
Fit is the average pairing score against beans, onion, 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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