Why it works: Cucumber and onion match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 6,050 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Modern Cookery
Ingredients
Directions
Prepare
Melt the butter in a pan.
Add the chopped onion and cook until soft.
Simmer
Stir in the cucumbers or minced mushrooms or curry powder.
Season with pepper and add water.
Simmer for 2 hours.
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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Cucumber + oniontop 8% of all pairsSmell alikestrongCooked together6,050 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Cucumber + peppertop 12% of all pairsSmell alikemoderateCooked together5,991 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter
- Carries fat and richness, helping the onion soften and the spices bloom in the pan.
- Onion
- Softens as it cooks, adding sweetness and a savoury base to the curry.
- Cucumbers or mushrooms
- Releases moisture and turns soft and tender during the long simmer.
- Curry powder
- Adds warm spice aroma and flavour to the sauce.
The step that matters
Simmer for 2 hours. A long, gentle simmer lets the vegetables break down and the liquid concentrate into a cohesive sauce. Too fast a boil can scorch the bottom of the pan or reduce the sauce too far.
Swap the cucumber
How well each one fits the dish's main ingredients (butter, onion, pepper):
- Potatofits better
- Capsicumfits better
- Chivefits better
- Cucumberthe original
Fit is the average pairing score against butter, onion, 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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