Why it works: Turnip and leek match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,046 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Old Peas Soup
Ingredients
Directions
Prepare the stock
Save the water from boiled pork or beef.
If using salt, add fresh water to it, or use fresh water entirely.
Simmer the water with roast beef bones, a ham bone, or 1-2 anchovies and some good whole or split peas.
Make the soup
Simmer until the peas can be pushed through a colander.
Set the pea pulp aside and add more of the cooking liquid along with the chopped carrots, turnip, leek, and celery.
Stew until all vegetables are tender, about 1 hour.
Serve
In a serving bowl, combine fried bread, dried mint, pepper, and salt if desired.
Pour the soup over the mixture in the bowl.
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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Turnip + leektop 1% of all pairsSmell alikestrongCooked together1,046 recipes
Shared aroma: coumarin (sweet, hay).
-
Carrot + celerytop 1% of all pairsSmell alikestrongCooked together10,173 recipes
Shared aroma: myristicin (spice, warm).
-
Carrot + turniptop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Pork + beeftop 1% of all pairsSmell alikestrongCooked together5,690 recipes
Shared aroma: 12-methyltridecanal (tallowy, beefy).
-
Turnip + celerytop 2% of all pairsSmell alikemoderateCooked together4,418 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Peas
- Break down into a thick pulp that gives the soup its body.
- Carrots
- Add gentle sweetness and soft texture as they stew until tender.
- Leek
- Contributes a mild, savoury onion-like aroma to the broth.
- Fried bread
- Adds crisp texture and soaks up some broth when the soup is poured over it.
The step that matters
Simmer the peas until they can be pushed through a colander. Peas must be fully softened before straining, because underdone peas stay grainy and will not pass smoothly, leaving a lumpy, uneven pulp.
Swap the peas
How well each one fits the dish's main ingredients (pork, meat, beef, carrot, turnip, leek, celery):
- Beansfits better
- Lentilsfits better
- Chestnutfits better
- Peasthe original
Fit is the average pairing score against pork, meat, beef, carrot, turnip, leek, celery. 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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