Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Simple Curry
Ingredients
Directions
Prepare
Slice the onion and chop the apple.
Melt the butter in a saucepan over medium heat.
Make the sauce
Add the onion and apple; fry until nicely browned.
Sprinkle in the flour, then the curry powder, and stir in the gravy.
Bring to a boil, then cut the meat into ½ inch squares and add it to the saucepan.
Simmer and finish
Simmer quietly for 2 hours, then flavor with lemon juice and salt.
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Apple + lemontop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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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).
-
Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
Flour and butter barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Meat
- Provides the main protein; slow simmering makes it tender and rich.
- Onion
- Browning adds sweetness and depth to the base of the curry.
- Cooking apple
- Adds mild sweetness and body that balances the curry spices.
- Flour
- Thickens the gravy so the curry becomes a cohesive sauce.
- Curry powder
- Supplies the aromatic spices that define the dish's flavor.
The step that matters
Fry the onion and apple until nicely browned. Browning caramelizes the natural sugars and builds deep flavor. Pale, undercooked onion tastes raw and flat, and that flavor carries into the finished curry.
Swap the apple
How well each one fits the dish's main ingredients (meat, onion, flour, butter, lemon):
- Avocadofits better
- Limefits better
- Coconutfits better
- Applethe original
Fit is the average pairing score against meat, onion, flour, butter, lemon. 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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