Why it works: Onion and beef are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Cream-of-green-pea Soup
Ingredients
Directions
Prepare the peas
Combine the peas, onion, and water in a stewpan.
Cook over medium heat for 20 minutes.
Remove the onion from the peas.
Mash the peas well.
Strain the mashed peas through a fine strainer, discarding the hulls.
Make the soup base
Pour the milk into a double boiler. Heat the milk.
Beat together the butter and flour in a bowl until smooth.
Gradually pour the hot milk into the butter-flour mixture, stirring constantly.
Combine and serve
Add the beef extract to the strained peas.
Season with salt and pepper.
Stir the pea mixture into the milk.
Cook for an additional 10 minutes.
Strain the soup again.
Serve hot.
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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Onion + beeftop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Cream + buttertop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Pepper + beeftop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Peas
- Provide the main body and green flavour of the soup once mashed and strained.
- Milk
- Forms the creamy liquid base that gives the soup its smooth, rich body.
- Butter and flour
- Together form a roux that thickens the milk into a smooth, velvety soup.
- Cream
- Adds richness and a silky mouthfeel through its fat content.
- Beef extract
- Adds concentrated savoury depth to the pea soup.
The step that matters
Adding the hot milk to the butter-flour mixture. Pouring hot milk in gradually while stirring constantly keeps the flour dispersed, so the roux thickens smoothly instead of forming lumps.
Swap the peas
How well each one fits the dish's main ingredients (milk, cream, butter, flour, onion, pepper, beef):
- Almondfits better
- Beansfits better
- Chestnutfits better
- Peasthe original
Fit is the average pairing score against milk, cream, butter, flour, onion, pepper, beef. 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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