Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 27,039 recipes mention both. Both carry 2-nonenal, which smells fatty, green. The science ↓
The recipe
Ingredients
Contains: milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare the cod sounds
Soak the cod sounds in a bowl of warm water with a little salt and vinegar for 24 hours.
Wash and dry the sounds.
Make the filling
In a stew pan, fry the onions in butter until nicely browned.
Mix the flour with a small amount of butter, then add to the onions.
Pour in the boiling water and stir until smooth.
Add the cod sounds, pepper, salt, white wine, essence of anchovies, and lemon juice.
Stir well and simmer for a few moments.
Bake
Transfer the mixture into a pie dish, cover with pie crust, and bake for 1 hour.
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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Pepper + lemontop 2% of all pairsAroma overlapstrongMentioned together27,039 recipes
Shared aroma: 2-nonenal (fatty, green).
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Butter + white winetop 3% of all pairsAroma overlapstrongMentioned together5,039 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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White wine + lemontop 4% of all pairsAroma overlapmoderateMentioned together3,764 recipes
Shared aroma: myrcene (balsamic, herbaceous).
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Onion + white winetop 5% of all pairsAroma overlapmoderateMentioned together4,426 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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
- Cod sounds
- Form the main body of the pie, becoming tender and flaky as they cook in the sauce.
- Flour
- Thickens the butter and onion mixture into a smooth, cohesive sauce.
- Butter
- Adds richness and carries flavor as it browns the onions.
- Onions
- Add sweetness and savory depth when browned.
- White wine
- Adds acidity and aromatic depth to the sauce.
- Pie crust
- Encloses the filling and browns in the oven as a top layer.
The step that matters
Stir the flour into the onions before adding the water. Cooking the flour with the butter and onions removes its raw taste and helps prevent lumps. Pouring in the boiling water and stirring steadily then gives a smooth, evenly thickened sauce.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (butter, flour, pepper, white wine, lemon):
- Capsicumbetter flavor fit
- Shallotbetter flavor fit
- Potatobetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, flour, pepper, white wine, lemon. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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