Why it works: Potato and onion 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
Ingredients
Directions
Prepare
Chop all the cold meat and potatoes until finely chopped.
Add chopped onions for flavor.
Cook and serve
Cook the mixture in a skillet until browned.
Serve hot.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Meat + potatotop 14% of all pairsSmell alikemoderateCooked together786 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Meat + oniontop 17% of all pairsSmell alikelowCooked together6,364 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold meat
- Provides the main savoury body and protein of the hash.
- Potatoes
- Add starchy bulk and help bind the mixture while it cooks.
- Onions
- Add sweetness and aroma as they soften and brown in the skillet.
The step that matters
Cook the mixture in a skillet until browned. Browning needs direct, even contact with a hot pan and enough room so the mixture fries rather than steams. Crowding the pan or stirring too often keeps it pale and soft. Browned surfaces develop deeper flavour through the Maillard reaction.
Swap the onion
How well each one fits the dish's main ingredients (meat, potato):
- Asparagusfits about as well
- Onionthe original
- Mustardfits about as well
- Chivefits about as well
Fit is the average pairing score against meat, potato. 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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