Why it works: Parsley and lemon 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, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Poach the fish
Remove the salt from the fish and place it in a large vessel with water, ensuring it does not boil.
Once it begins to boil, remove it from the heat and cover it to keep it tender.
Remove the skin and bones from the fish.
Make the sauce
Melt the butter in a saucepan.
Add flour, water, and a little salt.
Taste and adjust seasoning with more salt and pepper if needed.
Heat the sauce without boiling until it thickens, stirring well to make it smooth.
Mix a pinch of chopped parsley with glaze and lemon juice.
Taste the sauce.
If the sauce is too brown, add a little thick cream to lighten it.
Combine and serve
Gently mix the fish into the sauce.
Serve in a vol‑au‑vent or a deep dish with croutons.
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 + lemontop 1% of all pairsAroma overlapstrongMentioned together14,036 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Pepper + parsleytop 2% of all pairsAroma overlapstrongMentioned together34,118 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + lemontop 2% of all pairsAroma overlapstrongMentioned together27,039 recipes
Shared aroma: 2-nonenal (fatty, green).
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Butter + creamtop 3% of all pairsAroma overlapstrongMentioned together41,494 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Butter + flourtop 6% of all pairsAroma overlaplowMentioned together122,858 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour share little aroma chemistry, yet 122,858 recipes mention both: they likely work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Salt cod
- Provides the main body of the dish, flaked into the sauce as its protein base.
- Butter
- Enriches the sauce with fat and flavour as the base for the roux.
- Flour
- Thickens the butter and water into a smooth sauce that coats the fish.
- Lemon juice
- Adds acidity that brightens the rich, creamy sauce.
- Thick cream
- Lightens the colour and softens the texture of an overly brown sauce.
The step that matters
Heat the sauce without boiling. Flour thickens as its starch swells in warm liquid; boiling can cause the sauce to break or turn lumpy, so it should be heated gently while stirring until smooth.
“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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