Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Roast Wild 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
Place the onion halves inside the duck and let it sit for several hours.
Wipe the duck inside and out with a damp towel.
Tuck back the wings and truss the legs close to the body.
Rub the duck with salt, pepper, butter, and flour.
Roast and serve
Place the duck in a baking pan and add 1 cup of boiling water.
Roast in a 400°F (200°C) oven for 25 to 35 minutes, basting occasionally with butter.
Serve very hot with slices of lemon 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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
Butter and flour 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
- Wild duck
- Provides the main meat, which is lean and gains a crisp skin when roasted at high heat.
- Butter
- Adds fat that helps the skin brown and keeps the surface moist during basting.
- Flour
- Dusted on the skin, it helps the surface brown and crisp in the oven.
The step that matters
Roast in a 400°F (200°C) oven for 25 to 35 minutes, basting occasionally with butter. Wild duck is lean and cooks quickly, so overcooking dries the meat. Basting with butter adds moisture and helps the skin brown evenly.
Swap the onion
How well each one fits the dish's main ingredients (pepper, butter, flour, lemon):
- Shallotfits better
- Arrowrootfits better
- Okrafits better
- Onionthe original
Fit is the average pairing score against pepper, butter, flour, 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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