Why it works: Onion and leek match in chemistry and in kitchens. They rank in the top 4% of all ingredient pairs, and cooks put them together in 1,326 recipes. Both carry ethyl butyrate, which smells apple, fruity. The science ↓
Rice-soup, with Pease
Ingredients
Directions
Make the soup
Melt the butter in a stewpan.
Add the chopped onion and leek; fry until golden.
Add the rice and fry for 1 minute.
Moisten with warm water and bring to a boil.
Remove from heat and add cloves, salt, and parsley; boil gently.
After 10 minutes, add the green peas.
Once cooked, remove the parsley and cloves, and add a piece of butter.
Serve
Pour into a tureen 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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Onion + leektop 4% of all pairsSmell alikestrongCooked together1,326 recipes
Shared aroma: ethyl butyrate (apple, fruity).
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Leek + parsleytop 4% of all pairsSmell alikestrongCooked together759 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Leek + clovetop 6% of all pairsSmell alikestrongCooked together579 recipes
Shared aroma: 2-nonanone (fruity, floral).
-
Clove + parsleytop 6% of all pairsSmell alikestrongCooked together6,768 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
-
Leek + peastop 7% of all pairsSmell alikestrongCooked together249 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Rice
- Starch that thickens the soup as it cooks and gives it body.
- Butter
- Adds richness and fat, carrying flavour through the soup.
- Onion
- Sweetness and savoury depth when fried until golden.
- Leek
- Mild onion flavour that builds the base of the soup.
- Green peas
- Adds sweetness, colour and a tender texture.
The step that matters
Frying the rice. Frying the rice briefly in butter coats the grains in fat, which helps them stay separate and adds a toasty flavour. Keep it short so the rice does not brown or stick to the pan.
Swap the peas
How well each one fits the dish's main ingredients (butter, onion, leek, rice, clove, parsley):
- Lentilsfits better
- Chickpeafits better
- Beansfits better
- Peasthe original
Fit is the average pairing score against butter, onion, leek, rice, clove, parsley. 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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