Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Another Soup of Green Peas
Ingredients
Directions
Boil the shelled peas in water until tender.
In a bowl, mix the butter with flour until smooth, then add a little salt, black pepper, and a pinch of cayenne pepper to the butter mixture.
Stir the mixture into the boiling peas until the soup boils again.
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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Peas + peppertop 15% of all pairsSmell alikemoderateCooked together5,331 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Peas + buttertop 16% of all pairsSmell alikemoderateCooked together4,887 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Flour + peppertop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Shelled peas
- Form the body and main flavour of the soup.
- Butter
- Adds richness and fat that carries flavour and smooths the texture.
- Flour
- Thickens the soup as it is stirred into the hot liquid.
The step that matters
Stirring the butter and flour mixture into the boiling peas. Flour clumps if it hits hot liquid unblended. Working it smooth in the butter first and stirring it in while the soup is boiling helps it disperse evenly and thicken without lumps.
Swap the peas
How well each one fits the dish's main ingredients (butter, flour, pepper):
- Almondfits better
- Black-eyed peafits better
- Chestnutfits better
- Peasthe original
Fit is the average pairing score against butter, flour, pepper. 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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