Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Codfish Pie — Another Way
Ingredients
Directions
Prepare the sauce
Flake the cold codfish using two forks.
In a small pan, melt the butter and mix in the flour over heat.
Add the water and stir until it boils and becomes a smooth sauce.
Stir in the chopped parsley, mustard, salt, and pepper.
Assemble and bake
In a pie dish, layer half of the fish, half of the sauce, and a handful of grated bread.
Repeat with the remaining fish, sauce, and bread on top.
Drizzle melted butter over the top and place in the oven to brown or warm through.
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 their aromas overlap, and how often cooks already put them together.
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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Parsley + mustardtop 8% of all pairsSmell alikestrongCooked together2,588 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they 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
- Codfish
- Provides the main body and flaky texture of the pie.
- Flour
- Thickens the butter and water into a smooth sauce that binds the fish.
- Butter
- Adds richness and helps the topping brown in the oven.
- Bread
- Adds bulk and soaks up sauce, giving the layers body and a light crumb.
The step that matters
Making the sauce smooth. Flour must be cooked briefly in the melted butter before the water is added, and the mixture must be stirred while it boils. Stirring keeps starch granules dispersed so the sauce thickens without lumps.
Swap the mustard
How well each one fits the dish's main ingredients (butter, flour, parsley, pepper, bread):
- Shallotfits better
- Carrotfits better
- Chivefits better
- Mustardthe original
Fit is the average pairing score against butter, flour, parsley, pepper, bread. Candidates are from the same food group and used in at least 100 recipes.
“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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