Why it works: Parsley and lettuce match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 1,483 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Green Peas, English Style
Ingredients
Directions
Cook the peas
Bring 2 gallons of water to a boil in a saucepan over high heat.
Add 5 pounds of shelled green peas, a bunch of parsley, a head of lettuce, and a few green onions.
Season with salt and let boil until tender.
Drain the peas and remove the parsley faggot.
Serve
Serve the peas with a piece of butter in the middle and another piece on top.
Optionally, add a sprig of mint with the parsley or sprinkle finely chopped mint over the peas.
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 + lettucetop 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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Parsley + oniontop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Peas + parsleytop 13% of all pairsSmell alikemoderateCooked together1,885 recipes
Shared aroma: trans-2-hexenal (green, leafy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Green peas
- Form the main body of the dish, becoming tender and sweet as they cook.
- Butter
- Adds richness and a smooth coating of fat to the cooked peas.
- Lettuce
- Adds moisture and a mild, sweet flavour as it softens in the cooking water.
- Parsley
- Contributes a fresh, herbal aroma to the cooking water and peas.
The step that matters
Let the peas boil until tender. Green peas need enough time in boiling water for their starches to soften fully. Stopping early leaves them firm and floury, while overcooking dulls their bright green colour.
Swap the peas
How well each one fits the dish's main ingredients (parsley, lettuce, onion, butter):
- Chickpeafits better
- Lentilsfits better
- Beansfits better
- Peasthe original
Fit is the average pairing score against parsley, lettuce, onion, butter. 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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