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 the stock
Boil the fish bones and skin with the onion and red pepper in 1 cup of water.
Reduce the stock to ½ cup.
Make the sauce
Mix the butter and flour together.
Thicken the stock with this mixture.
Add a drop of almond extract to the sauce.
Heat and serve
Flake the cold boiled halibut and place it in a steamer to heat without drying.
Pour the sauce over the halibut and garnish with 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).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
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 body of the dish.
- Butter
- Adds richness and fat that carries flavour in the sauce.
- Flour
- Thickens the stock into a smooth sauce when cooked with butter.
- Onion
- Adds savoury aroma and sweetness to the stock.
The step that matters
Thickening the stock with the butter and flour mixture. Flour must be cooked into the hot stock so starch swells and thickens evenly. Added to hot liquid without first blending with butter, it clumps and leaves lumps.
Swap the onion
How well each one fits the dish's main ingredients (pepper, butter, flour, almond, parsley):
- Shallotfits better
- Arrowrootfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against pepper, 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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