Why it works: Vinegar and horseradish are a kitchen classic. They rank in the top 6% of all ingredient pairs, and 2,588 recipes mention both. Both carry isobutyraldehyde, which smells malty, green. The science ↓
The recipe
Ingredients
Contains: fish, shellfish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Poach the cod
Fill a fish kettle with water, vinegar, and salt, then add horseradish and bring to a boil.
Once boiling, add the cod.
Cook until done, checking the fins and appearance.
Drain the fish and place it on a hot fish plate or strainer.
Serve
Transfer to a warm dish, placing the liver on each side.
Serve with shrimp or oyster sauce and garnish with horseradish.
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 aroma chemistry they share, and how many recipes mention both.
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Vinegar + horseradishtop 6% of all pairsAroma overlaplowMentioned together2,588 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Horseradish + shrimptop 12% of all pairsAroma overlaplowMentioned together190 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
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Vinegar + shrimptop 14% of all pairsAroma overlapmoderateMentioned together836 recipes
Shared aroma: 3-methylbutanol (malty, whiskey).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod
- Forms the main body of the dish, cooked gently in the poaching liquid until flaky.
- Vinegar
- Adds acidity to the poaching liquid, which helps firm the fish's surface and brightens its flavor.
- Horseradish
- Adds sharp, pungent aroma that complements the mild flavor of the fish.
The step that matters
Cooking until done. Cod overcooks quickly in simmering liquid, and proteins that set past their point turn dry and tough. Checking the flesh rather than relying only on time helps keep it moist.
Flavor stand-ins for the horseradish
How well each one fits the dish's main ingredients (vinegar, shrimp):
- Capsicumbetter flavor fit
- Cucumberbetter flavor fit
- Mustardbetter flavor fit
- Horseradishthe original
Fit is the average pairing score against vinegar, shrimp. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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