Why it works: Parsley and butter are a kitchen classic. They rank in the top 8% of all ingredient pairs, and 28,543 recipes mention both. Both carry trans-2-hexenal, which smells green, leafy. 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 mackerel and remove the insides.
Season the fish with salt.
Cook and serve
Melt the butter in a pan over medium heat.
Add the mackerel and cook until golden brown on both sides.
Sprinkle with chopped parsley 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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Parsley + buttertop 8% of all pairsAroma overlapmoderateMentioned together28,543 recipes
Shared aroma: trans-2-hexenal (green, leafy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mackerel
- Forms the main body of the dish and cooks to a golden, flaky texture.
- Butter
- Carries heat across the pan and helps the fish brown richly while adding flavour.
- Parsley
- Adds fresh, herbal aroma that contrasts with the rich butter and fish.
The step that matters
Cooking the mackerel until golden brown on both sides. Fish is delicate and sticks or breaks if moved too early. Let the surface form a crust, then turn it once. Browning from the butter's milk solids adds flavour, but over-high heat can burn the butter before the fish cooks through.
“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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