Why it works: Peas and onion are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 5,460 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Green Peas
Ingredients
Directions
Prepare
Gather fresh green peas when the seeds are half grown and cook them as soon as possible.
Cook
Boil the peas in water, adding a pinch of coarse sea salt and good butter.
If the peas lack sweetness, add a little sugar to the cooking water.
Boil slowly with the cover partially off the pot for 20 to 30 minutes, until tender but still firm.
Avoid overcooking to preserve color and flavor.
For overgrown peas, cook with a pinch of small white onions for added flavor.
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.
Photo for illustrative purposes only · Contact us to use it
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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Peas + oniontop 13% of all pairsSmell alikemoderateCooked together5,460 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Peas + buttertop 16% of all pairsSmell alikemoderateCooked together4,887 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Peas + sugartop 31% of all pairsSmell alikelowCooked together1,928 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fresh green peas
- Provide the main body, sweet flavor and tender texture of the dish.
- Good butter
- Adds richness and a smooth, glossy mouthfeel to the cooked peas.
- Sugar
- Adds sweetness to peas that taste starchy or less sweet.
The step that matters
Avoid overcooking. Peas turn dull, olive-colored and mushy when cooked too long, because heat breaks down the chlorophyll that keeps them green and softens their cell structure. Stop when they are tender but still firm.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (peas, butter, sugar):
- Asparagusfits better
- Leekfits better
- Sweet potatofits better
- Onionthe original
Fit is the average pairing score against peas, butter, sugar. 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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