Why it works: Milk and butter 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 ↓
Pea Soup, Dr. Fluhrer's Favorite
Ingredients
Directions
Make the soup base
In a pot, heat the chicken stock until boiling.
Add the can of peas and cook for 5 minutes.
Make the roux and finish
In a separate pan, melt the butter and stir in the flour to make a roux.
Gradually add the milk to the roux, stirring until smooth.
Combine the roux with the pea mixture, season with salt and pepper, and simmer for 10 minutes.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Chicken + milktop 13% of all pairsSmell alikemoderateCooked together4,389 recipes
Shared aroma: 1-hexanal (fruit).
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Chicken + peastop 13% of all pairsSmell alikemoderateCooked together1,528 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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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
- Chicken stock
- Forms the liquid base that carries the peas and sets the soup's savory flavor.
- Peas
- Provide the main body, color and sweet, vegetal flavor of the soup.
- Butter
- Adds richness and carries flavor, and forms the fat base for the roux.
- Flour
- Thickens the soup as a roux with the butter, giving it a smooth, body-rich texture.
- Milk
- Adds creaminess and mildness, softening the soup's flavor and texture.
The step that matters
Adding the milk to the roux. Adding liquid gradually while stirring keeps the starch granules dispersed, so the roux blends smooth instead of forming lumps. Cooking the flour in the butter first also removes raw starch taste and helps the sauce thicken evenly.
Swap the peas
How well each one fits the dish's main ingredients (chicken, milk, butter, flour, pepper):
- Almondfits better
- Cashew nutfits better
- Beansfits better
- Peasthe original
Fit is the average pairing score against chicken, milk, 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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