Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Potato Cream Soup
Ingredients
Directions
Prepare
Wash and peel the potatoes, then slice them.
Peel and slice the onion.
Make the soup
Melt the butter in a stew-pan, then add the potatoes and onion, frying gently without browning.
Add the veal stock and milk, bring to a boil, and skim off any foam.
Stir in the ground rice and cook gently until the vegetables are tender.
Rub the mixture through a fine sieve back into the stew-pan.
Add the cream and season with salt, pepper, and nutmeg, then reheat without boiling.
Serve
Serve with small croutons of fried bread.
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.
-
Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + ricetop 7% of all pairsSmell alikestrongCooked together851 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Milk + ricetop 7% of all pairsSmell alikemoderateCooked together7,374 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Provide the bulk of the body, which thickens the soup when puréed.
- Butter
- Adds richness and carries flavour while the vegetables fry gently.
- Ground rice
- Thickens the soup slightly and gives it a smoother, fuller texture.
- Cream
- Adds richness and a silky mouthfeel to the finished soup.
- Veal stock
- Provides the savoury liquid base that gives the soup its depth.
- Milk
- Adds creaminess and mild sweetness to the soup base.
The step that matters
Reheat without boiling. Once cream is added, boiling can cause it to separate or curdle and leave the soup grainy. Gentle heat keeps it smooth.
Swap the onion
How well each one fits the dish's main ingredients (potato, butter, milk, veal, rice, cream, pepper):
- Capsicumfits about as well
- Asparagusfits about as well
- Onionthe original
- Leekfits about as well
Fit is the average pairing score against potato, butter, milk, veal, rice, cream, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Brown Bread461 recipes
Potato Croquettes255 recipes
Rice Fritters84 recipes
White Bread80 recipes