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Lyonnaise Potatoes

Sautéed sliced boiled potatoes with butter, onions, salt, pepper, and parsley garnish.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Lyonnaise Potatoes

Ingredients

Directions

Make the onions

  1. Melt butter in a skillet over medium heat.

  2. Cook sliced onion until browned.

  3. Remove onion and keep warm.

Brown the potatoes

  1. Add sliced cold boiled potatoes to the skillet, sprinkle with salt and pepper, and stir until well mixed with butter.

  2. Press potatoes to one side of the skillet and let them brown richly underneath.

  3. Sprinkle cooked onions over the potatoes and heat thoroughly.

Serve

  1. Turn the potatoes onto a hot serving platter, top side down.

  2. Sprinkle with finely chopped parsley.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Pepper + parsleytop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  2. Onion + potatotop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Potato + parsleytop 5% of all pairs
    Smell alikemoderate
    Cooked together2,855 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  4. Onion + parsleytop 9% of all pairs
    Smell alikemoderate
    Cooked together25,843 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  5. Potato + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together8,305 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Butter
Coats the potatoes and fries the onions, adding richness and golden browning.
Onion
Browns to add sweetness and savory depth to the potatoes.
Cold boiled potatoes
Form the body of the dish, crisping on the outside while staying tender inside.

The step that matters

Let the potatoes brown richly underneath. Leaving the potatoes undisturbed lets their surface caramelize into a crisp golden crust. Stirring too early prevents this and leaves the dish soft and pale.

Swap the onion

How well each one fits the dish's main ingredients (butter, potato, pepper, parsley):

  1. Carrotfits better
  2. Chivefits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against butter, potato, pepper, parsley. 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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