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 ↓
Cream of Pea Soup
Ingredients
Directions
Prepare
Press the can of French peas through a colander.
In a double boiler, heat the milk until boiling.
Add the peas to the boiling milk.
In a small bowl, rub together the butter and flour.
Thicken and season
Add the butter and flour mixture to the boiling milk and stir until it thickens.
Season with salt and pepper to taste.
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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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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 + milktop 16% of all pairsSmell alikemoderateCooked together1,309 recipes
Shared aroma: hexanal (green, grassy).
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
- French peas
- Provide the main pea flavour and body of the soup.
- Milk
- Forms the liquid base and adds creaminess and richness.
- Butter
- Adds richness and flavour, and coats the flour for smooth blending.
- Flour
- Thickens the milk as it heats, giving the soup a smooth, body-rich texture.
The step that matters
Adding the butter and flour mixture to the boiling milk. Flour thickens only when its starch is hydrated and heated, and dropping in raw flour clumps it. Rubbing butter and flour together first coats the starch so it disperses smoothly, and stirring keeps the mixture even as it thickens.
Swap the peas
How well each one fits the dish's main ingredients (milk, butter, flour, pepper):
- Almondfits better
- Chestnutfits better
- Milletfits better
- Peasthe original
Fit is the average pairing score against 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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