Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Green Pea Soup
Ingredients
Directions
Cook and purée the peas
In a stew pan, combine the peas, boiling water, and onion.
Cook until tender, about 30 minutes.
Drain the water, saving it for later.
Mash the peas finely.
Add the reserved water to the mashed peas and rub through a puree sieve.
Return the mixture to the saucepan.
Finish the soup
Mix the flour and butter or drippings together.
Add the mixture to the peas along with the salt and pepper.
Gradually stir in the boiling hot milk.
Beat well and cook for 10 minutes, stirring frequently.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Peas + oniontop 13% of all pairsSmell alikemoderateCooked together5,460 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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 of the soup when mashed and pushed through a sieve.
- Milk
- Adds creaminess and a smooth, rich body to the soup.
- Butter or drippings
- Adds fat for richness and carries flavor, and combines with flour to thicken.
- Flour
- Thickens the soup as its starch swells during cooking.
- Onion
- Adds savory aroma that mellows and sweetens as it cooks.
The step that matters
Gradually stir in the boiling hot milk. Adding the milk slowly while stirring lets the flour and fat disperse evenly, preventing lumps. Continued cooking and stirring then swells the starch so the soup thickens smoothly.
Swap the peas
How well each one fits the dish's main ingredients (butter, milk, flour, onion, pepper):
- Almondfits better
- Beansfits better
- Chestnutfits better
- Peasthe original
Fit is the average pairing score against butter, milk, flour, onion, 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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