Why it works: Beans and onion match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and 5,241 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the puree
Soak the beans in cold water with salt and onions until soft.
Pass the mixture through a sieve to create a puree.
Finish and serve
Melt butter in a stewpan, then slowly add the puree.
Stir in claret and simmer for 15 minutes.
Serve the puree over croutons in a soup tureen.
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 aroma chemistry they share, and how many recipes mention both.
-
Beans + oniontop 5% of all pairsAroma overlapstrongMentioned together5,241 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + buttertop 7% of all pairsAroma overlapmoderateMentioned together42,827 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Beans + buttertop 10% of all pairsAroma overlapstrongMentioned together2,792 recipes
Shared aroma: 2,3-pentanedione (butter, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Red haricot beans
- Provide the starchy body that becomes the thick puree of the soup.
- Butter
- Adds richness and a smooth, rounded mouthfeel to the puree.
- Claret
- Adds acidity and wine flavour to the finished soup.
- Onions
- Add aromatic flavour that softens and infuses into the beans as they soak.
The step that matters
Slowly adding the puree to the melted butter. Adding the puree gradually and stirring helps it combine smoothly with the butter instead of separating or clumping. Keeping the mixture smooth gives the soup an even, velvety texture.
Flavor stand-ins for the beans
How well each one fits the dish's main ingredients (onion, butter):
- Sesamebetter flavor fit
- Soybeanabout as good a flavor fit
- Peanutabout as good a flavor fit
- Beansthe original
Fit is the average pairing score against onion, butter. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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
Illustration
Illustration
Illustration
IllustrationThe Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
Prefer an account? Create a free account for sign-in; Pro adds the full results and chemistry.