Why it works: Lettuce and spinach match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 427 recipes. Both carry 2-isobutyl-3-methoxypyrazine, which smells green bell pepper, earthy. The science ↓
Green Pea-Soup
Ingredients
Directions
Make the base
Melt the butter in a stew-pan.
Add the ham, stock, green peas, onions, and cabbage lettuces.
Simmer on low heat for 1 hour.
Stir in 2 quarts of stock and the crumb of the French rolls.
Boil for 1 hour.
Prepare the spinach and finish
Blanch the spinach, strain it, and squeeze dry.
Rub the soup through a fine sieve with the spinach for color.
Boil the younger peas in 1 pint of stock until done.
Add the stock and peas to the soup and a little sugar, then boil again.
Add salt if desired.
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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Lettuce + spinachtop 1% of all pairsSmell alikestrongCooked together427 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Cabbage + lettucetop 4% of all pairsSmell alikestrongCooked together622 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Peas + lettucetop 5% of all pairsSmell alikestrongCooked together1,293 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Cabbage + spinachtop 6% of all pairsSmell alikestrongCooked together190 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Onion + cabbagetop 7% of all pairsSmell alikestrongCooked together3,001 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
- Green peas
- Provide the main body and sweet, vegetal flavor of the soup.
- Butter
- Adds richness and carries flavor from the start of the cooking.
- Onions
- Build a sweet, savory aromatic base as they soften in the stock.
- French rolls
- Their crumb thickens the soup and gives it a smoother body.
- Cabbage lettuces
- Add mild vegetal flavor and extra body during the long simmer.
- Spinach
- Adds bright green color and a fresh, earthy note when rubbed through.
The step that matters
Rub the soup through a fine sieve with the spinach. Pushing the soup through a fine sieve removes fibrous bits and gives a smooth texture. Spinach must be blanched and squeezed dry first, so excess water does not thin the soup and the color stays vivid.
Swap the peas
How well each one fits the dish's main ingredients (butter, ham, onion, cabbage, lettuce, spinach, sugar):
- Chestnutfits better
- Beansfits better
- Lentilsfits better
- Peasthe original
Fit is the average pairing score against butter, ham, onion, cabbage, lettuce, spinach, 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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