Why it works: Butter and parsley 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
Clean and gut the mackerel.
Melt butter in a pan.
Add the mackerel and cook until golden brown.
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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Butter + parsleytop 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
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IllustrationThe Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
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