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 ↓
Cod, Hashed
Ingredients
Directions
Make the sauce
Blend butter and flour in a stewpan, frying for a few minutes without browning.
Add milk and stir until it boils.
Combine and serve
Flake cod into small pieces and add it with the shrimps.
Cook until everything is thoroughly hot, then season with pepper and salt to taste.
On a hot dish, create a deep border with mashed potatoes.
Pour the hash into the center and sprinkle with chopped 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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Potato + parsleytop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Pepper + potatotop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Milk + potatotop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Enriches the sauce and carries flavor while being cooked with flour without browning.
- Flour
- Thickens the butter and milk into a smooth white sauce that holds the fish together.
- Milk
- Forms the liquid base of the sauce, which thickens as it comes to a boil.
- Cod
- Provides the main body and flaky texture of the hash.
The step that matters
Bringing the sauce to a boil while stirring. Flour thickens milk only when it boils and is stirred, so the starch gelatinizes evenly. Stopping early leaves a thin sauce, and stirring too little can cause lumps to form.
Swap the parsley
How well each one fits the dish's main ingredients (butter, flour, milk, shrimp, pepper, potato):
- Parsleythe original
- Nutmegfits about as well
- Dillfits about as well
- Garlicfits about as well
Fit is the average pairing score against butter, flour, milk, shrimp, pepper, potato. 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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