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 Pease Soup
Ingredients
Directions
Prepare the peas
Dissolve the bread in water.
Shell the peas, keeping old and young separate.
Boil the old peas in the bread water until tender, then pulp them through a colander while warm. Retain the water and set the pulp aside for future use.
In the retained water, boil the young peas with sweet herbs, cloves, mace, white pepper, and salt.
Make the soup
In a frying pan, melt the butter and add the chopped lettuces, spinach, parsley, onions, and cucumbers. Stew the vegetables in the butter until tender, then transfer them to the boiling pea water.
Boil for 30 minutes, then add the reserved pulped peas and bread, boiling for a short time longer.
Adjust thickness with more water as needed, then stir in a few ounces of butter 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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Lettuce + spinachtop 1% of all pairsSmell alikestrongCooked together427 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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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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Clove + macetop 6% of all pairsSmell alikelowCooked together8,400 recipes
Shared aroma: methyleugenol (clove, spice).
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Clove + lettucetop 8% of all pairsSmell alikestrongCooked together486 recipes
Shared aroma: 2-nonanone (fruity, floral).
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 flavour of the soup, with old peas pulped to thicken it.
- Bread
- Dissolved in water and added to the pulp, it helps thicken the soup.
- Butter
- Stewing the greens in it adds richness and carries flavour, and a final addition gives a silky finish.
- Lettuces
- Softened in butter, they add tender body and a mild sweetness to the soup.
- Spinach
- Stewed until tender, it adds colour and a soft, earthy flavour.
The step that matters
Pulping the old peas while warm. Pulping while the peas are still warm helps them break down smoothly into the water. Once cooled, the starches firm up and the pulp is harder to press through, leaving a grainy texture.
Swap the white pepper
How well each one fits the dish's main ingredients (peas, bread, clove, mace, butter, lettuce, spinach):
- Nutmegfits better
- Cinnamonfits better
- Tarragonfits better
- White pepperthe original
Fit is the average pairing score against peas, bread, clove, mace, butter, lettuce, 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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