Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Mutton Hash
Ingredients
Directions
Prepare the gravy
Put the bones in a pan with a little water and simmer for 1 hour.
Strain the gravy.
Make the hash
Mince the cold left mutton very fine.
Mince the onions.
Brown the onions in a stew pan with a little dripping and flour.
Add the gravy and simmer slowly for 20 minutes.
Season the mince with pepper and coarse sea salt, then shake in flour and mix well.
Stir the mixture into the pan and heat thoroughly.
Serve.
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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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mutton + peppertop 16% of all pairsSmell alikelowCooked together5,442 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Mutton + oniontop 18% of all pairsSmell alikelowCooked together4,531 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Flour + peppertop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold left mutton
- Forms the meat body of the hash and carries its main flavour.
- Onions
- Browning in fat builds sweetness and savoury depth into the gravy base.
- Flour
- Thickens the gravy and helps the mixture bind together.
- Dripping (or oil)
- Fat carries heat for browning the onions and adds richness.
The step that matters
Brown the onions in dripping and flour. Browning develops deep flavour through the Maillard reaction, while flour cooked in the fat loses its raw taste and helps thicken the gravy. Pale or burnt onions change the final flavour noticeably.
Swap the onion
How well each one fits the dish's main ingredients (mutton, flour, pepper):
- Turnipfits better
- Shallotfits better
- Spinachfits better
- Onionthe original
Fit is the average pairing score against mutton, flour, pepper. 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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