Why it works: Onion and vinegar are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 18,226 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓
Indian Curry
Ingredients
Directions
Prepare
Chop the onions and fry them in butter until golden brown.
Add the chopped apple, curry powder, vinegar or lemon juice, and cut the meat into small squares.
Cook and serve
Stew the mixture for 1½ hours.
Just before serving, mix in 1 tablespoon of milk.
Serve with rice.
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.
-
Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
-
Apple + buttertop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Vinegar + appletop 16% of all pairsSmell alikemoderateCooked together1,884 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
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
- Onions
- Fry to golden brown, building sweetness and savory depth as the base of the curry.
- Lean steak
- Provides the main protein, which turns tender during the long stew.
- Apple
- Adds natural sweetness that balances the curry powder's heat.
- Vinegar or lemon juice
- Adds acidity that brightens the rich, slow-cooked flavors.
- Butter
- Carries the onions' browning and adds richness to the sauce.
The step that matters
Frying the onions until golden brown. Onions cooked slowly until browned develop sweetness and deep flavor through caramelization, which forms the base of the whole curry. Pale or undercooked onions leave the sauce tasting flat and sharp.
Swap the apple
How well each one fits the dish's main ingredients (onion, vinegar, butter):
- Avocadofits better
- Plumfits better
- Mangofits better
- Applethe original
Fit is the average pairing score against onion, vinegar, butter. 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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