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 ↓
Mutton-hash, with Onions
Ingredients
Directions
Make the onion base
In a flat stewpan, melt the butter and add the minced onions.
Fry the onions gently, stirring, until they are nicely colored.
Season with salt and pepper, then sprinkle with flour.
Add the mutton
Moisten with white wine and a little gravy, and let it boil.
Add the slices of cooked mutton to the stewpan and warm them without boiling.
Season again and add chopped parsley before serving.
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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Butter + white winetop 9% of all pairsSmell alikemoderateCooked together5,083 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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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 + 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
- White onions
- Soften and brown to form the sweet, savoury base of the hash.
- Butter
- Fat that carries the onions' cooking and adds richness.
- Flour
- Thickens the liquid into a gravy that coats the mutton.
- White wine
- Adds acidity and depth, loosening the pan as it boils.
- Cooked mutton
- Main protein, warmed through in the thickened sauce.
The step that matters
Warming the mutton without boiling. Cooked meat turns tough and dry when it is held at a boil. Keeping the sauce just below boiling warms the slices gently and keeps them tender.
Swap the onion
How well each one fits the dish's main ingredients (butter, pepper, flour, white wine, mutton, parsley):
- Shallotfits better
- Carrotfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against butter, pepper, flour, white wine, mutton, 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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