Why it works: Carrot and celery match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,173 recipes. Both carry myristicin, which smells spice, warm. The science ↓
Bechamel Sauce
Ingredients
Directions
Prepare
Finely slice the onion, carrot, and celery.
Make the sauce
Boil them in ½ pint of milk or stock with the bouquet of herbs, pepper, and salt for 45 minutes.
Strain the mixture.
Thicken the sauce with 2 ounces of flour and 1 ounce of butter.
Cook the sauce for 10 minutes.
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.
Photo for illustrative purposes only · Contact us to use it
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 + celerytop 1% of all pairsSmell alikestrongCooked together10,173 recipes
Shared aroma: myristicin (spice, warm).
-
Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Carrot + peppertop 6% of all pairsSmell alikestrongCooked together14,555 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).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Thickens the liquid into a smooth sauce as its starch swells when heated.
- Butter
- Combines with the flour to form a roux that helps thicken the sauce and adds richness.
- Milk or stock
- Forms the liquid base that the vegetables are simmered in and the sauce is built on.
- Onion
- Adds savoury depth and aroma to the liquid as it simmers.
The step that matters
Thicken the sauce with flour and butter. Flour must be cooked with the butter and liquid long enough for its starch to swell and lose its raw taste. Adding it to a hot liquid without proper mixing can form lumps, so it should be whisked smooth.
Swap the onion
How well each one fits the dish's main ingredients (carrot, celery, pepper, milk, flour, butter):
- Parsnipfits better
- Potatofits better
- Turnipfits better
- Onionthe original
Fit is the average pairing score against carrot, celery, pepper, milk, flour, 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.
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
Celery Stew25 recipes
Celery Croquettes16 recipes