Why it works: Mustard and celery are a kitchen classic. They rank in the top 2% of all ingredient pairs, and cooks put them together in 4,169 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
Boy Bean Soup I
Ingredients
Directions
Prepare the beans
Soak the soy beans overnight.
In the morning, drain the beans and add celery and cold water.
Cook for four hours or until tender.
Make the soup
Slice the onion thinly and brown it slightly in the butter.
Add flour, mustard, salt, pepper, and the cooked beans with water.
Reheat to boiling, then strain the mixture.
Pour the strained soup over sliced hard-boiled eggs and lemon.
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.
-
Mustard + celerytop 2% of all pairsSmell alikemoderateCooked together4,169 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Celery + lemontop 3% of all pairsSmell alikestrongCooked together3,467 recipes
Shared aroma: beta-phellandrene (minty, terpene).
-
Beans + mustardtop 4% of all pairsSmell alikestrongCooked together852 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 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
- Soy beans
- Provide the main body and protein-rich base that gives the soup its substance.
- Butter
- Adds fat and richness while browning the onion for flavour.
- Flour
- Thickens the soup as it cooks, giving it a smoother body.
- Hard-boiled eggs
- Add texture and substance as the garnish laid over the soup.
- Lemon
- Adds acidity that brightens the soup's flavour.
The step that matters
Reheat to boiling, then strain the mixture. Flour needs to come to a boil to fully cook and thicken the liquid, and straining removes the beans' solids so the soup stays smooth rather than grainy.
Swap the onion
How well each one fits the dish's main ingredients (beans, mustard, butter, celery, flour, lemon, pepper):
- Lettucefits better
- Shallotfits better
- Okrafits better
- Onionthe original
Fit is the average pairing score against beans, mustard, butter, celery, flour, lemon, 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.
Lemon Sauce236 recipes
Cream of Celery Soup113 recipes
Celery Stew25 recipes
Celery Croquettes16 recipes