Why it works: Parsley and spinach match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 1,025 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Green Pea Soup, No. 2
Ingredients
Directions
Prepare the peas
Separate old peas from young peas, reserving young peas to use whole in the soup.
Boil the large peas, then drain and dry them.
Make the soup
In a stewpan, combine large peas with bacon (or butter), parsley, and enough water to cover.
Simmer until the peas are tender, then rub through a sieve or pound in a mortar.
Dilute the pea paste with veal broth flavored with onion, or milk for a maigre soup.
Add spinach leaves or juice for color, then pass through a tamis.
Stir in the tender young peas and warm them before serving.
If no young peas are available, serve with small croutons.
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 + spinachtop 5% of all pairsSmell alikestrongCooked together1,025 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Peas + spinachtop 8% of all pairsSmell alikemoderateCooked together550 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Peas + parsleytop 13% of all pairsSmell alikemoderateCooked together1,885 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Peas + buttertop 16% of all pairsSmell alikemoderateCooked together4,887 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Large peas
- Form the body of the soup as they soften and break down into a smooth paste.
- Bacon or butter
- Adds fat for richness and a savory flavor base to the soup.
- Veal broth or milk
- Thins the pea paste and adds savory depth or creaminess.
- Spinach leaves or juice
- Provides the green color of the finished soup.
The step that matters
Pass the soup through a sieve or tamis. Rubbing or straining the cooked peas breaks down the fibers and removes skins, giving a smooth, even texture instead of a grainy one.
Swap the peas
How well each one fits the dish's main ingredients (butter, parsley, veal, spinach):
- Chickpeafits better
- Lentilsfits better
- Pistachiofits better
- Peasthe original
Fit is the average pairing score against butter, parsley, veal, 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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