Why it works: Fish and oyster match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 488 recipes mention both. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
The recipe
Ingredients
Contains: fish, shellfish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare
Empty and wash the cod thoroughly.
Scrape off all the scales and cut open the belly.
Wash and dry the fish well, then rub a little salt inside or soak it in strong brine for 1 hour.
Cook and serve
Tie up the head and place the fish in a large pot with plenty of water and salt.
Boil gently for 20 minutes after the water starts boiling.
Serve with oyster sauce, garnished with lemon slices and 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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Fish + oystertop 3% of all pairsAroma overlapstrongMentioned together488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Sauce + horseradishtop 6% of all pairsAroma overlapmoderateMentioned together775 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Fish + lemontop 6% of all pairsAroma overlapmoderateMentioned together1,855 recipes
Shared aroma: 2-nonenal (fatty, green).
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Oyster + horseradishtop 7% of all pairsAroma overlaplowMentioned together282 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
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Lemon + horseradishtop 8% of all pairsAroma overlapmoderateMentioned together1,155 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod fish
- Forms the main body of the dish, cooked gently in water until flaky.
- Oyster sauce
- Adds savory, salty depth as a sauce served alongside the cooked fish.
The step that matters
Boil gently for 20 minutes after the water starts boiling. A rolling boil can break the fish apart and toughen the flesh. Keeping the water at a gentle simmer cooks the fish evenly and keeps it tender and moist.
“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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