Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Beef Hash
Ingredients
Directions
Prepare
Chop the cold roast beef or beefsteak into small pieces.
Fry the chopped onion in butter until brown.
Cook the hash
Add the chopped beef to the pan and season with salt and pepper.
Moisten with beef gravy or water and a little butter.
Cook until heated through, but do not overcook to avoid toughening the meat.
Optionally, let a crust form on the bottom and serve with poached eggs on top.
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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Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beef + peppertop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Beef + buttertop 16% of all pairsSmell alikemoderateCooked together10,847 recipes
Shared aroma: 2-furfurylthiol (coffee, roasted).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold roast beef or beefsteak
- Provides the meat that forms the body of the hash.
- Onion
- Browns in butter to add sweetness and savoury depth.
- Butter
- Fats the pan for frying and adds richness and browning.
- Beef gravy or water
- Moistens the meat so it stays tender while heating.
The step that matters
Cook until heated through, but do not overcook. Beef already cooked becomes tough and dry when heated for too long, because prolonged heat squeezes out moisture and tightens the muscle fibres. Heat only until it is warmed through.
Swap the onion
How well each one fits the dish's main ingredients (beef, butter, pepper):
- Potatofits about as well
- Onionthe original
- Capsicumfits about as well
- Tomatofits about as well
Fit is the average pairing score against beef, butter, 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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