Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Real Irish Stew
Ingredients
Directions
Prepare the mutton
Cut the mutton into neat pieces, removing some fat.
Season the mutton with salt and pepper.
Place the mutton in a saucepan and cover with water.
Simmer gently for 30 minutes.
Pour the cooking liquid into a basin.
Cool it in cold water until the fat rises and can be removed.
Prepare the vegetables
Boil the potatoes for 15 minutes.
Peel and slice the potatoes.
Blanch the onions.
Peel and slice the onions into rings.
Layer and simmer
Layer the sliced vegetables in a pan.
Add a layer of meat.
Repeat the layers.
Season with salt and pepper.
Pour the reserved cooking liquid over the layers.
Add more water or stock if needed to cover.
Cover the pan tightly.
Simmer for several hours, ensuring it never boils hard.
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 + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mutton + meattop 14% of all pairsSmell alikemoderateCooked together936 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Potato + meattop 14% of all pairsSmell alikemoderateCooked together786 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton
- Provides the rich meat flavour and tender texture after long, gentle simmering.
- Potatoes
- Thicken the stew as their starch softens and absorbs the cooking liquid.
- Onions
- Add sweetness and aroma as they soften and mellow during slow cooking.
The step that matters
Simmer gently without boiling hard. A hard boil toughens the meat proteins and breaks up the potatoes, while gentle simmering lets collagen slowly soften into tender meat and keeps the stew clear.
Swap the onion
How well each one fits the dish's main ingredients (mutton, potato, meat, pepper):
- Capsicumfits about as well
- Carrotfits about as well
- Asparagusfits about as well
- Onionthe original
Fit is the average pairing score against mutton, potato, meat, 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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