Why it works: Celery and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 18,518 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
To Boil Fish
Ingredients
Directions
Put the fish in a kettle of boiling water, enough to cover it.
Add salt and vinegar or lemon juice to the water.
Reduce heat to simmer after adding the fish to avoid breaking it.
Add celery, onion, bay leaf, and peppercorns for flavor.
Cook for 15 minutes per pound of fish.
If not using a fish kettle, place the fish on a plate, tie it in a cloth, and then put it in the kettle.
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.
-
Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Vinegar + oniontop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
-
Vinegar + celerytop 17% of all pairsSmell alikemoderateCooked together5,627 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Fish + oniontop 19% of all pairsSmell alikelowCooked together1,924 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Fish + celerytop 21% of all pairsSmell alikelowCooked together353 recipes
Shared aroma: alpha-pinene (pine, turpentine).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fish
- Is the main food cooked gently in the simmering liquid until it turns opaque and flakes.
- Vinegar or lemon juice
- Adds acidity that brightens the flavor of the poaching liquid and the fish.
The step that matters
Reduce heat to simmer after adding the fish. Once the fish goes in, a hard rolling boil agitates the flesh and can break it apart. A gentle simmer cooks the fish evenly while keeping it intact.
Swap the celery
How well each one fits the dish's main ingredients (fish, vinegar, onion):
- Garlicfits better
- Tarragonfits better
- Capersfits better
- Celerythe original
Fit is the average pairing score against fish, vinegar, onion. 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 boiled fish recipes
You might also like
Fried Fish120 recipes
Cream of Celery Soup113 recipes
Fish Croquettes81 recipes
Scalloped Cod69 recipesThe 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.