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
Cut the cod into portions, separating the head and shoulders.
Bind the head and shoulders with broad tape three or four times.
Boil and serve
Fill a kettle with water and add salt, vinegar, and horseradish.
Bring the water to a boil and add the fish.
Boil until the fish is cooked through, ensuring the thicker parts are done properly.
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
- Forms the main body of the dish, cooking to a flaky, tender texture when heated through.
- Horseradish
- Adds a sharp, pungent aroma that flavours the poaching water and the fish.
The step that matters
Boil until the fish is cooked through, ensuring the thicker parts are done properly.. Thick parts like the head and shoulders take longer to heat through than thinner portions. If they are underdone, the flesh stays translucent and may be unsafe, while thinner areas overcook and dry out. Checking the thickest section ensures even doneness.
“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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