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 ↓
Split Peas
Ingredients
Directions
Prepare
Rinse the split peas under cold water.
Soak the peas in cold water for a few hours or overnight.
Cook
Add the soaked peas and enough cold water to cover them in a pot.
Bring the water to a near boil, then reduce the heat to a gentle simmer.
For richer flavor, avoid boiling; simmer gently.
Cook for about two hours until the peas are tender but not mushy.
Optionally, add chopped onions for additional flavor during cooking.
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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Peas + oniontop 13% of all pairsSmell alikemoderateCooked together5,460 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
- Split peas
- Form the main body of the dish, thickening as their starch softens during long simmering.
The step that matters
Simmer gently instead of boiling. A rolling boil can break the peas apart and turn them mushy, while a gentle simmer lets them soften evenly and hold their shape.
“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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