Why it works: Carrot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,053 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Haricot Soup
Ingredients
Directions
Prepare
Soak the haricot beans overnight in cold water.
Cut up the vegetables.
Make the soup
In a large pot, combine the soaked beans, chopped vegetables, water, butter, herbs, salt, and pepper.
Bring to a gentle boil and cook for 3½ to 4 hours, stirring occasionally.
Once the beans are tender, strain the soup through a sieve, adding more water if needed.
Return the soup to the pot, stir in the chopped parsley, and bring to a boil 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.
-
Carrot + parsleytop 1% of all pairsSmell alikestrongCooked together8,053 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Carrot + celerytop 1% of all pairsSmell alikestrongCooked together10,173 recipes
Shared aroma: myristicin (spice, warm).
-
Turnip + carrottop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + parsleytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Haricot beans
- Provide the main body and starch that thicken the soup as they cook and break down.
- Onions
- Add sweetness and savory depth as they soften during the long simmer.
- Butter
- Adds richness and fat, giving the soup a smoother mouthfeel.
The step that matters
Cooking the beans until fully tender. Dried haricot beans need a long, gentle simmer to soften fully. Undercooked beans stay firm and grainy, and a hard boil can break the skins and cloud the broth.
Swap the onion
How well each one fits the dish's main ingredients (beans, turnip, carrot, celery, parsley, butter, pepper):
- Parsnipfits better
- Leekfits better
- Lettucefits better
- Onionthe original
Fit is the average pairing score against beans, turnip, carrot, celery, parsley, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Carrot Soup134 recipes
Cream of Celery Soup113 recipes
Turnip Soup43 recipes
Celery Stew25 recipes