Why it works: Grape and apple match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,659 recipes. Both carry 2-isobutyl-3-methoxypyrazine, which smells green bell pepper, earthy. The science ↓
Roast Duck
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the duck
Pick the duck.
Singe the duck.
Draw the duck.
Wash the duck.
Wipe the duck.
Truss the duck.
Roast
Dredge the duck with salt, pepper, and flour.
Roast the duck in a hot oven at 400°F (200°C) for about 30 minutes for a young duck, or 1 hour for a full-grown duck, basting every 10 minutes.
Serve
Make a giblet gravy.
Serve with grape or currant jelly.
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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Grape + appletop 1% of all pairsSmell alikestrongCooked together1,659 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Pepper + grapetop 11% of all pairsSmell alikemoderateCooked together1,909 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + appletop 18% of all pairsSmell alikemoderateCooked together3,026 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + appletop 22% of all pairsSmell alikemoderateCooked together6,140 recipes
Shared aroma: isobutyraldehyde (malty, green).
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 and bastes the meat as it roasts.
- Flour
- Dusting on the skin helps it brown and crisp in the hot oven.
- Salt
- Seasons the meat and helps draw flavour through the skin.
The step that matters
Roast the duck in a hot oven. Duck skin holds a thick layer of fat that must render slowly and evenly; basting every 10 minutes helps keep the meat moist and the skin browned. Cooking too long dries the lean meat, so timing should match the duck's age and size.
Swap the apple
The recipe marks apple as optional. How well each one fits the dish's main ingredients (pepper, flour, grape):
- Mangofits better
- Figfits better
- Cherryfits better
- Applethe original
Fit is the average pairing score against pepper, flour, grape. 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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