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 (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the fish
Rub a little salt down the bone and thick part of the fish.
Tie a fold or two of wide tape around it to prevent breaking.
Poach
Place it in a fish kettle with enough cold water to cover it and add salt.
Add vinegar and horseradish.
Bring the water just to the verge of boiling, then reduce to a gentle simmer.
Cook until the meat separates easily from the bone, skimming the surface as needed.
Drain and carefully slip the fish onto a neatly folded napkin in a dish.
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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod's head and shoulders
- Provides the main body of the dish, with bone and thick meat that hold together during poaching.
- Coarse sea salt
- Seasons the fish and firms the surface of the flesh before cooking.
- Vinegar
- Adds a sharp acidity that brightens the mild flavor of the fish.
The step that matters
Simmering without boiling. Keeping the water at a gentle simmer rather than a rolling boil helps the delicate fish cook evenly and stay intact, so it does not break apart or toughen.
“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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