Why it works: Fish and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 4,488 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
To Boil Fish
Ingredients
Directions
Prepare
Wash the fish well and truss it into shape.
Poach
Place the fish in hot water with vinegar and salt.
Do not boil; cook until the skin begins to crack.
Serve
Drain the fish and serve on a dish garnished with parsley.
If desired, serve with melted butter or parsley and butter sauce.
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 their aromas overlap, and how often cooks already put them together.
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Fish + buttertop 12% of all pairsSmell alikemoderateCooked together4,488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Parsley + buttertop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Vinegar + parsleytop 16% of all pairsSmell alikemoderateCooked together6,477 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Fish + parsleytop 18% of all pairsSmell alikelowCooked together2,341 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Vinegar + buttertop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fish
- Main protein; its flesh sets from translucent to opaque and flakes as it cooks.
- Butter
- Optional sauce that adds richness and fat for a silky mouthfeel.
The step that matters
Do not boil; cook until the skin begins to crack.. Boiling agitates and toughens delicate fish flesh, causing it to break apart. Gentle, near-simmering heat cooks the fish evenly while keeping it moist and tender.
Swap the parsley
The recipe marks parsley as optional. How well each one fits the dish's main ingredients (fish, vinegar, butter):
- Tarragonfits better
- Capersfits about as well
- Parsleythe original
- Pepperfits less well
Fit is the average pairing score against fish, vinegar, butter. Candidates are from the same food group and used in at least 100 recipes.
“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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