Why it works: Vinegar and horseradish are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 2,609 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
How to Boil Fish
Ingredients
Directions
Poach the fish
Wrap the head of the fish with broad tape three or four times to prevent the cheeks from breaking.
Place the fish in a kettle of cold water.
Add salt, sweet herbs, vinegar, and shredded horseradish.
Bring the water to a boil and maintain a gentle boil until the fish is cooked, about 30 minutes for a moderate-sized piece.
Check for doneness by inserting a fish slice into the backbone; if the flesh lifts off easily, the fish is ready.
Serve
Remove the fish and gently unwind the tape.
Garnish with scraped horseradish and serve with liver and roe on the side.
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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Vinegar + horseradishtop 12% of all pairsSmell alikemoderateCooked together2,609 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Fish + horseradishtop 16% of all pairsSmell alikelowCooked together178 recipes
Shared aroma: octanal (fat, soap).
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Fish + vinegartop 26% of all pairsSmell alikelowCooked together1,036 recipes
Shared aroma: acetoin (butter, cream).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fish
- Provides the main protein, which turns firm and flaky as it cooks gently in the liquid.
- Vinegar
- Adds acidity that brightens the flavour of the poaching liquid and the fish.
- Horseradish
- Contributes a sharp, pungent aroma that flavours the poaching water and the garnish.
- Coarse sea salt
- Seasons the poaching liquid and the fish as it cooks.
The step that matters
Maintain a gentle boil. A vigorous boil agitates and breaks up delicate fish flesh, so the water should only simmer gently once the fish is in it.
Swap the horseradish
How well each one fits the dish's main ingredients (fish, vinegar):
- Cucumberfits better
- Mustardfits about as well
- Horseradishthe original
- Capsicumfits about as well
Fit is the average pairing score against fish, vinegar. 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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