Why it works: Celery and pepper match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 16,012 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Peas Soup
Ingredients
Directions
In a large pot, combine water or broth, ham bone, celery, onions, and split peas.
Bring to a boil and cook until the peas are soft.
Remove the bones and strain the peas and vegetables through a sieve.
Return the mixture to the pot, season with salt and pepper, and boil for an additional hour, skimming as needed.
For added flavor, stir in spinach or green peas before serving.
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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Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Celery + spinachtop 5% of all pairsSmell alikestrongCooked together616 recipes
Shared aroma: 2-methoxy-4-vinylphenol (clove, smoky).
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Pepper + spinachtop 6% of all pairsSmell alikemoderateCooked together3,400 recipes
Shared aroma: nonanal (fat, citrus).
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Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
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Peas + spinachtop 8% of all pairsSmell alikemoderateCooked together550 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Split peas
- Break down into a thick, creamy body when cooked and strained.
- Ham bone
- Releases savory flavor into the cooking liquid as the soup simmers.
- Celery
- Adds aromatic, savory depth to the broth as it cooks.
- Onions
- Contribute sweetness and aromatic flavor as they soften in the broth.
The step that matters
Skimming during the final boil. Foam and impurities rise to the surface while the soup boils for an extra hour. Skimming them keeps the soup clean-tasting and clear rather than scummy.
Swap the peas
The recipe marks peas as optional. How well each one fits the dish's main ingredients (ham, celery, onion, pepper, spinach):
- Black-eyed peafits better
- Lentilsfits better
- Beansfits better
- Peasthe original
Fit is the average pairing score against ham, celery, onion, pepper, spinach. 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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