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 ↓
Potatoes a LA Lyonnaise
Ingredients
Directions
In a skillet, melt the butter over medium heat.
Add the sliced onion and fry until it begins to brown.
Stir in the sliced potatoes, seasoning with salt and pepper.
Keep shaking the skillet until the potatoes are heated through and start to brown.
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).
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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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Butter + potatotop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onion
- Softens and browns in the butter, adding sweetness and savory depth to the dish.
- Butter
- Carries heat evenly across the pan and adds richness and browning flavor.
- Potatoes
- Form the bulk of the dish, turning tender inside while their surfaces brown in the fat.
The step that matters
Keep shaking the skillet until the potatoes start to brown. Frequent movement keeps slices from sticking and burning while the surfaces brown evenly, so the potatoes develop color without scorching in spots.
Swap the onion
How well each one fits the dish's main ingredients (butter, potato, pepper):
- Capsicumfits about as well
- Chivefits about as well
- Onionthe original
- Carrotfits about as well
Fit is the average pairing score against butter, potato, 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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