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
Prepare the chicken
Pick the chicken.
Singe the chicken.
Wipe the chicken with a wet towel.
Draw it carefully.
Truss the chicken to keep its shape while boiling.
Place the chicken in a saucepan and cover it with boiling water.
Remove any scum that rises and simmer the chicken slowly until tender.
Prepare the peas and thickener
Shell the green peas and boil them in salted water until tender, then drain and cool in cold water.
Mix the butter and flour to a smooth paste.
Make the soup
Once the chicken is tender, remove it from the broth and reserve for another dish.
Add the drained peas to the broth along with the butter and flour mixture, stirring until dissolved.
Add water or milk if needed to achieve a creamy consistency.
Bring the soup to a boil, season to taste, and serve.
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 + milktop 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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Flour + milktop 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
- Green peas
- Form the body of the soup and give it its green color and sweet, vegetal flavor.
- Flour
- Thickens the broth into a smooth, creamy consistency when cooked with the butter.
- Butter
- Adds richness and fat, carrying flavor and smoothing the thickened texture.
- Chicken
- Gives the broth its savory base flavor as it simmers.
The step that matters
Adding the butter and flour paste to the broth. If the flour paste is added without being smooth or fully stirred in, it forms lumps that do not dissolve. Whisking it into the hot liquid lets the starch disperse evenly and thicken the soup smoothly.
Swap the white pepper
How well each one fits the dish's main ingredients (chicken, peas, butter, flour, milk):
- Cinnamonfits better
- Thymefits better
- Tarragonfits better
- White pepperthe original
Fit is the average pairing score against chicken, peas, butter, flour, milk. 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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