Why it works: Pepper and parsley 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 ↓
Fish in White Sauce
Ingredients
Directions
Prepare
Flake the cold boiled halibut and place it in a steamer to heat without drying.
Boil the bones and skin of the fish with the onion and red pepper until reduced to ½ cup.
Make the sauce
Thicken the stock with the butter and flour mixed together.
Add a drop of extract of almond to the sauce.
Serve
Pour the sauce over the halibut and garnish with bits of parsley.
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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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Flour + almondtop 5% of all pairsSmell alikemoderateCooked together8,673 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + almondtop 11% of all pairsSmell alikemoderateCooked together9,245 recipes
Shared aroma: 2,3-pentanedione (butter, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Halibut
- Provides the main protein and flaky texture of the dish.
- Fish stock
- Forms the liquid base of the sauce, carrying its savoury flavour.
- Butter
- Adds richness and fat, and helps smooth the sauce.
- Flour
- Thickens the stock into a white sauce when cooked with the butter.
The step that matters
Thicken the stock with the butter and flour. Flour must be cooked into the fat and stock so the sauce thickens smoothly without lumps or a raw starchy taste. Adding it straight to hot liquid without mixing it with butter first can produce lumps.
Swap the onion
How well each one fits the dish's main ingredients (pepper, fish, butter, flour, almond, parsley):
- Shallotfits better
- Chivefits better
- Arrowrootfits better
- Onionthe original
Fit is the average pairing score against pepper, fish, butter, flour, almond, parsley. 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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