Why it works: Lemon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 14,036 recipes mention both. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
The recipe
Ingredients
Contains: milk, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare
Clean the cod's head and remove any gills.
Cook and serve
Boil the cod's head in salted water until cooked through.
Drain and place on a serving platter.
Melt butter and mix with lemon juice and chopped parsley.
Pour the butter mixture over the cod's head before serving.
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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Lemon + parsleytop 1% of all pairsAroma overlapstrongMentioned together14,036 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Butter + parsleytop 8% of all pairsAroma overlapmoderateMentioned together28,543 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Butter + lemontop 8% of all pairsAroma overlapstrongMentioned together41,197 recipes
Shared aroma: 3-hexenal (apple, fruity).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod's head
- Forms the main body of the dish, providing the flaky white flesh that is served.
- Butter
- Adds richness and fat, carrying flavour and giving the dressing a smooth, glossy texture.
- Lemon juice
- Adds acidity that brightens the rich butter and balances the mild flavour of the fish.
The step that matters
Boil the cod's head until cooked through. Fish proteins set and turn opaque as they heat. Undercooked flesh stays translucent and clings to bone, while overcooking makes it dry and stringy. Cooking until just opaque keeps it 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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