Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. 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
Singe the duck well and wash it in salt and water.
Stuff the duck with mashed potatoes, onion, salt, and pepper.
Fill the breast and body with the potato mixture, then tie and skewer tightly.
Dredge the duck with flour and sprinkle with salt and pepper.
Roast and make gravy
Roast in a hot oven at 400°F (200°C) for one hour, basting frequently.
For gravy, add a little water to the pan with the chopped giblets and thicken with flour.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + appletop 14% of all pairsSmell alikemoderateCooked together603 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
-
Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 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 rich meat and fat that form the main dish.
- Mashed potatoes
- Fill the cavity and add moisture and body to the stuffing as it cooks.
- Flour
- Coats the skin and later thickens the pan juices into gravy.
- Giblets
- Add savory meaty flavor to the gravy.
The step that matters
Basting during roasting. Regular basting spreads the rendered fat and pan juices over the skin, helping it brown and stay moist. Duck fat renders slowly, so the skin can turn out pale or greasy if neglected.
Swap the apple
How well each one fits the dish's main ingredients (potato, onion, pepper, flour, sauce):
- Avocadofits better
- Limefits better
- Mangofits better
- Applethe original
Fit is the average pairing score against potato, onion, pepper, flour, 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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