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 Cakes
Ingredients
Directions
Prepare
Chop the potatoes, meat, and onion finely.
In a skillet, melt butter over medium heat.
Cook and serve
Add the chopped mixture to the skillet and fry until golden brown.
Serve the hash cakes topped with poached eggs on toast.
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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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 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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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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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
- Potatoes
- Form the bulk of the cake and give it a starchy, tender body when fried.
- Meat
- Adds savoury flavour and substance, binding the cake with the potato.
- Onion
- Adds aroma and sweetness that deepens as it cooks in the butter.
- Butter
- Conducts heat for frying and helps the outside turn golden brown.
- Poached eggs
- Add a soft, runny yolk that enriches the dish when served on top.
The step that matters
Fry until golden brown. Cooking over medium heat lets the outside brown through the Maillard reaction while the interior heats through. Too high a heat scorches the surface before the potato is cooked inside.
Swap the onion
How well each one fits the dish's main ingredients (potato, meat, pepper, butter, egg):
- Asparagusfits better
- Capsicumfits better
- Chivefits about as well
- Onionthe original
Fit is the average pairing score against potato, meat, pepper, butter, egg. 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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