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 into a kettle of boiling water, enough to cover it.
Add salt and vinegar or lemon juice to the water.
Do not let the water boil rapidly after adding the fish; let it simmer.
Add celery, onion, bay leaf, and peppercorns to improve flavor, if desired.
Cook for 15 minutes per pound of fish.
If not using a fish kettle, place the fish on a plate and tie it in a cloth before putting 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.
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Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
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Vinegar + oniontop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
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Vinegar + celerytop 17% of all pairsSmell alikemoderateCooked together5,627 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Fish + oniontop 19% of all pairsSmell alikelowCooked together1,924 recipes
Shared aroma: 2,4-decadienal (seaweed).
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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
- Its protein firms and turns opaque as it cooks gently in the water.
- Vinegar or lemon juice
- Adds acidity that brightens the flavor of the poached fish.
The step that matters
Keep the water at a simmer after adding the fish. A rapid boil agitates and toughens the delicate protein, which can break the fish apart and make it dry and rubbery. Gentle heat cooks it evenly and keeps the flesh tender and intact.
Swap the celery
The recipe marks celery as optional. 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.
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