Why it works: Flour and butter 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 ↓
Pea Soup
Ingredients
Directions
Prepare
Shell the peas.
Put the peas into boiling water.
Finish the soup
Mix flour with butter until smooth.
Stir the flour mixture into the soup a few minutes before the peas are done.
Add white sugar and season with pepper and salt to taste.
Serve hot.
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.
Photo for illustrative purposes only · Contact us to use it
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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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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Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
Flour and butter 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
- Peas
- Form the body of the soup, giving it its main flavour and bulk.
- Flour
- Thickens the soup as it cooks, giving it a fuller body.
- Butter
- Adds richness and fat, smoothing the flour into the broth.
- White sugar
- Adds a touch of sweetness that balances the savoury peas.
The step that matters
Stirring the flour and butter into the soup. Mixing flour with butter first keeps it from clumping. Adding it near the end, while the soup is hot but not overcooked, lets it thicken evenly without lumps or a raw floury taste.
Swap the peas
How well each one fits the dish's main ingredients (flour, butter, sugar, pepper):
- Almondfits better
- Chestnutfits better
- Cashew nutfits better
- Peasthe original
Fit is the average pairing score against flour, butter, sugar, 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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