Why it works: Onion and potato match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 9,019 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Make the ragout
Heat the drippings in a saucepan until hot.
Fry the meat until almost done, then remove it from the pan.
Mix the browned flour with a little lukewarm water, then stir it into the boiling water.
Season the mixture with salt and cayenne pepper, then add the meat, onions, and partially boiled potatoes.
Cover and stew until the vegetables are tender.
Finish and serve
Remove the meat and vegetables, skim the fat from the gravy, and adjust seasoning if necessary.
Pour the gravy over the ragout and 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 aroma chemistry they share, and how many recipes mention both.
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Onion + potatotop 2% of all pairsAroma overlapstrongMentioned together9,019 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + potatotop 5% of all pairsAroma overlapstrongMentioned together8,303 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + oniontop 6% of all pairsAroma overlapmoderateMentioned together68,463 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mutton + peppertop 7% of all pairsAroma overlapmoderateMentioned together5,442 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
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Mutton + oniontop 8% of all pairsAroma overlapmoderateMentioned together4,530 recipes
Shared aroma: 2-nonanone (fruity, floral).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton, veal, beef, or rabbit
- Provides the main body of the ragout and flavour as it browns and simmers.
- Browned flour
- Thickens the gravy and adds a toasted, nutty flavour and colour.
- Onions
- Soften during stewing, adding sweetness and depth to the gravy.
- Potatoes
- Partly cooked before stewing, they finish tender and add body and starch to the dish.
The step that matters
Skimming the fat from the gravy. Fat from the meat and drippings rises to the surface during stewing. Removing it before serving keeps the gravy from tasting greasy and gives it a cleaner texture.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (mutton, flour, pepper, potato):
- Carrotbetter flavor fit
- Capsicumbetter flavor fit
- Asparagusabout as good a flavor fit
- Onionthe original
Fit is the average pairing score against mutton, flour, pepper, potato. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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