Why it works: Onion and cucumber 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 ↓
Vegetable Soup
Ingredients
Directions
Make the soup
Melt the butter in a large pot over medium heat.
Add the vegetable marrow, onions, and cucumbers; sauté until lightly browned.
Stir in the apples or tomatoes, curry powder, and salt.
Pour in the water, broth, or stock; bring to a boil.
Reduce heat and simmer for 30 to 40 minutes until vegetables are tender.
Finish
Skim off any butter that appears on the surface.
Stir in a little arrowroot mixed with cold broth to absorb it.
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.
Photo for illustrative purposes only · Contact us to use it
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 + cucumbertop 8% of all pairsSmell alikestrongCooked together6,050 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + appletop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Cucumber + appletop 15% of all pairsSmell alikemoderateCooked together363 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + appletop 19% of all pairsSmell alikemoderateCooked together3,206 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
- Vegetable marrow
- Forms the bulk of the soup and softens into a tender, mild body as it simmers.
- Onions
- Build savory sweetness and aroma as they soften and brown in the butter.
- Cucumbers
- Add moisture and a delicate, fresh flavor that mellows during simmering.
- Apples or tomatoes
- Add acidity and fruity sweetness that balance the curry powder.
- Curry powder
- Supplies the warm, aromatic spice flavor that defines the soup.
- Butter
- Carries the spices and adds richness and a rounded, savory flavor.
The step that matters
Sauté until lightly browned. Browning the marrow, onions, and cucumbers builds deeper flavor through the Maillard reaction. Crowding the pot or using too little heat causes steaming, which yields a flatter taste.
Swap the apple
How well each one fits the dish's main ingredients (butter, onion, cucumber):
- Avocadofits better
- Coconutfits better
- Mangofits better
- Applethe original
Fit is the average pairing score against butter, onion, cucumber. 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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