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 ↓
Lyonnaise Potatoes
Ingredients
Directions
Prepare
Peel and slice the potatoes into thin rounds.
In a frying pan, melt the butter over medium heat.
Cook
Add the sliced onion and cook until browned.
Add the potato slices to the pan and sauté until golden and tender.
Season with coarse sea salt and white pepper to taste.
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.
-
Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Potato + white peppertop 20% of all pairsSmell alikelowCooked together157 recipes
Shared aroma: myrcene (balsamic, herbaceous).
-
Butter + white peppertop 28% of all pairsSmell alikelowCooked together3,814 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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 dish and turn tender while their starch helps them brown in the pan.
- Butter
- Adds fat for frying, carries flavour and helps the potatoes and onion brown.
- Onion
- Adds sweetness and savoury depth as it browns in the pan.
The step that matters
Sauté the potatoes until golden and tender. Thin slices need enough heat and space to brown without steaming. Crowding the pan or using low heat makes them soft and pale instead of golden.
Swap the white pepper
How well each one fits the dish's main ingredients (potato, butter, onion):
- Garlicfits better
- Thymefits better
- Parsleyfits better
- White pepperthe original
Fit is the average pairing score against potato, butter, onion. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Potato Croquettes255 recipes
Potato Rolls78 recipes
Potato Chips53 recipes
Sweet Potato Croquettes53 recipes