Why it works: Butter and cream are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
Menu for a Party of Eight
Ingredients
Directions
Prepare the onions
Parboil the onions.
Cut the parboiled onions roughly.
Make the soup
Place the onions in a saucepan with butter, sugar, pepper, and salt.
Cook slowly without browning until the onions are soft.
Add rice or barley and broth, and simmer until the mixture is soft.
Stir in the grated cheese and mix well for 1-2 minutes.
Pass the mixture through a sieve to create a puree.
Heat gently in a double boiler and stir in the cream before serving.
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 + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Onion + ricetop 9% of all pairsSmell alikemoderateCooked together10,433 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Sugar + creamtop 9% of all pairsSmell alikemoderateCooked together43,450 recipes
Shared aroma: 2,3-butanedione (butter, sweet).
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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
- Bombay onions
- Form the base of the soup, becoming sweet and soft as they cook down into a puree.
- Butter
- Adds fat and richness, carrying flavour while the onions cook slowly.
- Boiled rice or pearl barley
- Adds body and thickness, helping the puree feel smooth and substantial.
- Broth
- Supplies liquid that softens the onions and carries their flavour through the soup.
- Rich cream
- Adds smoothness and a mellow, rounded richness to the finished soup.
The step that matters
Cook slowly without browning. Gentle heat softens the onions and draws out their natural sweetness. High heat browns them, producing bitter, caramelised notes that change the soup's clean flavour and pale colour.
Swap the onion
How well each one fits the dish's main ingredients (butter, sugar, pepper, rice, cheese, cream):
- Capsicumfits better
- Potatofits better
- Mustardfits better
- Onionthe original
Fit is the average pairing score against butter, sugar, pepper, rice, cheese, cream. 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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