Why it works: Pepper and apple are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 3,026 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Roast Duck
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare
Preheat the oven to 350°F (175°C).
Season the duck inside and out with salt and pepper.
Roast and serve
Place the duck in a roasting pan and roast for about 1.5 hours, or until the skin is crispy and the juices run clear.
Serve with apple sauce on the side.
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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Pepper + appletop 18% of all pairsSmell alikemoderateCooked together3,026 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + saucetop 27% of all pairsSmell alikelowCooked together15,303 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Apple + saucetop 31% of all pairsSmell alikelowCooked together965 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Pepper and sauce barely smell alike, yet cooks put them together in 15,303 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
- Duck
- Provides the main protein and rich fat that renders out during roasting, crisping the skin.
- Apple sauce
- Adds a sweet, acidic contrast that cuts through the rich duck fat.
The step that matters
Roasting until the skin is crispy. Duck skin holds a thick layer of fat beneath it. Roasting slowly lets that fat render out so the skin crisps rather than staying rubbery. Cooking should continue until the juices run clear, which indicates the meat is cooked through.
Swap the apple
How well each one fits the dish's main ingredients (pepper, sauce):
- Limefits better
- Lemonfits better
- Mangofits better
- Applethe original
Fit is the average pairing score against pepper, sauce. 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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