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 ↓
Hash, Nursery
Ingredients
Directions
Prepare
Parboil the onions and potatoes until slightly tender.
Cut the onions, potatoes, and celery into small pieces.
Cook
Place them in a stewpan, add salt, pepper, and stock, and cook until the celery is soft and the potatoes are broken up.
In a separate saucepan, heat the cut-up meat in the stock.
Mix the contents of both pans together 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 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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Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Potato + celerytop 7% of all pairsSmell alikemoderateCooked together2,047 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + celerytop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton or lamb
- Provides the main meat flavour and the substance of the hash.
- Potatoes
- Break down during cooking to thicken the hash and give it a soft, cohesive body.
- Onions
- Add savoury sweetness and aroma as they soften in the stock.
- Stock
- Supplies moisture and flavour, cooking the vegetables and carrying the taste through the dish.
The step that matters
Cook until the potatoes are broken up. Potatoes must be cooked until they begin to collapse, since their starch releases into the liquid and thickens it. Undercooked potatoes stay firm and do not bind the hash together.
Swap the celery
How well each one fits the dish's main ingredients (mutton, onion, potato, meat, pepper):
- Garlicfits better
- Thymefits about as well
- Parsleyfits about as well
- Celerythe original
Fit is the average pairing score against mutton, onion, 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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