Why it works: Parsley and pepper 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 ↓
Peas a LA Francaise
Ingredients
Directions
Make the peas
Melt the butter in a saucepan.
Add the peas, chopped onion, shredded lettuce, and white stock.
Cook slowly for 30 minutes.
Add pepper and salt, then allow the boil to go off.
Stir in the beaten egg yolks and cook for a few minutes without boiling.
Serve
Serve as a luncheon dish with croutons of fried bread or as a vegetable.
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Lettuce + parsleytop 5% of all pairsSmell alikestrongCooked together1,483 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Peas + lettucetop 5% of all pairsSmell alikestrongCooked together1,293 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Lettuce + oniontop 8% of all pairsSmell alikestrongCooked together3,562 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 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
- Egg yolks
- Thicken the stock into a smooth, creamy sauce when gently cooked, without curdling.
- Lettuce
- Softens as it cooks, adding body and a mild sweetness to the liquid.
- White stock
- Forms the cooking liquid that the peas and vegetables simmer in.
- Peas
- Form the main body of the dish and give its sweet, fresh flavour.
The step that matters
Stir in the egg yolks without boiling. Egg yolks thicken through gentle heat. If the liquid boils after they go in, the proteins scramble and curdle, leaving the sauce grainy instead of smooth.
Swap the onion
How well each one fits the dish's main ingredients (peas, butter, lettuce, parsley, egg, pepper):
- Shallotfits better
- Spinachfits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against peas, butter, lettuce, parsley, egg, 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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