Why it works: Beans and tomato match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 2,713 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Bean Soup
Ingredients
Directions
Prepare
Soak the beans in cold water overnight.
Drain and wash the beans in fresh water.
Make the soup
Put the beans into a soup kettle with the beef stock.
Boil slowly for at least 3 hours.
Two hours before serving, add the sliced onion and carrot.
If desired, strain the soup to serve hot.
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.
-
Beans + tomatotop 1% of all pairsSmell alikestrongCooked together2,713 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beans + carrottop 4% of all pairsSmell alikestrongCooked together1,443 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
-
Carrot + tomatotop 6% of all pairsSmell alikestrongCooked together3,606 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + carrottop 6% of all pairsSmell alikemoderateCooked together21,601 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 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
- Beans
- Form the main body of the soup and thicken it as they break down during long simmering.
- Beef stock
- Provides the liquid base and savory flavor for the soup.
- Onion
- Adds aromatic sweetness and depth as it softens and releases its flavor into the broth.
- Carrot
- Adds mild sweetness and body as it softens in the simmering broth.
The step that matters
Boil slowly for at least 3 hours. A gentle simmer lets the beans soften fully and release starch that thickens the broth. A hard boil can break the beans apart and make the soup cloudy.
Swap the tomato
The recipe marks tomato as optional. How well each one fits the dish's main ingredients (beans, beef, onion, carrot):
- Potatofits about as well
- Leekfits about as well
- Turnipfits about as well
- Tomatothe original
Fit is the average pairing score against beans, beef, onion, carrot. 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.
More bean soup recipes
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.
Tomato Bisque11 recipes
Indian Spiced Potato Soup with Tofu and Spinach448 recipes
Clear Carrot and Bottle Gourd Soup65 recipes
Mock Bisque Soup51 recipes