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 the fish in a kettle and cover with cold water, adding salt and vinegar.
Bring the water to just below boiling, then reduce heat to simmer gently.
Cook until the meat separates easily from the bone, skimming the surface as needed.
Drain the fish and transfer it to 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 protein, which firms and flakes as it cooks.
- Coarse sea salt
- Seasons the fish and helps firm the flesh before cooking.
- Vinegar
- Adds a light acidity that brightens the flavour of the poaching water.
The step that matters
Bring the water to just below boiling, then reduce heat to simmer gently.. Boiling vigorously can break the delicate flesh apart and cloud the surface. Gentle simmering cooks the fish evenly while keeping it intact and tender.
“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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