Why it works: Pepper and celery match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 16,012 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Pea Soup
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the peas
Soak the dried peas overnight.
Boil the peas for 2 to 3 hours with salt, pepper, and celery or celery seed.
Rub the mixture through a colander and return to the pot, adding more water if the soup is too thick.
Finish the soup
Mix the flour with the butter and a little hot soup until smooth, then stir it back into the pot.
Butter both sides of the stale bread, cut it into dice, and brown in a 400°F (200°C) oven.
Add the browned bread to the soup just 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.
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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Pepper + celerytop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Peas + breadtop 11% of all pairsSmell alikemoderateCooked together804 recipes
Shared aroma: hexyl acetate (fruity, apple).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Peas + celerytop 12% of all pairsSmell alikemoderateCooked together1,832 recipes
Shared aroma: linalool (floral, citrus).
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
- Dried peas
- Form the main body of the soup and thicken it as they break down when boiled.
- Flour
- Thickens the soup with the butter, giving it a smoother, heavier body.
- Butter
- Adds richness and carries the flour so it blends in without lumps.
- Stale bread
- Browns in the oven to make crisp croutons that contrast with the smooth soup.
The step that matters
Mixing the flour and butter into the soup. Flour added directly to hot liquid clumps. Mixing it first with butter and a little hot soup until smooth lets the starch disperse evenly, so the soup thickens without lumps.
Swap the peas
How well each one fits the dish's main ingredients (pepper, celery, flour, butter, bread):
- Chestnutfits better
- Beansfits better
- Almondfits better
- Peasthe original
Fit is the average pairing score against pepper, celery, flour, butter, bread. 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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