Why it works: Onion and potato 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 ↓
Ducks to Roast and Stuff with Potato Stuffing
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.
Prepare the stuffing
Preheat the oven to 350°F (175°C).
Boil the potatoes until tender, then mash them finely.
Boil each onion for 1 minute with a little salt, then chop finely.
Mix the chopped onions with the mashed potatoes, seasoning with salt, pepper, and thyme.
Stuff the duck with the potato and onion mixture.
Roast and baste
Place the duck in a roasting pan with plenty of water and some butter.
Baste the duck every 5 to 10 minutes while roasting.
Once the oil is rendered, rub the duck with butter, sprinkle with flour, and add more hot water as needed.
Add the giblets to the pan; chop finely and mix into the gravy after cooking.
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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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + thymetop 4% of all pairsSmell alikemoderateCooked together11,585 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Potato + thymetop 5% of all pairsSmell alikemoderateCooked together1,586 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Onion + thymetop 7% of all pairsSmell alikemoderateCooked together11,171 recipes
Shared aroma: coumarin (sweet, hay).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Duck
- Provides the main meat and the fat that renders and bastes the bird during roasting.
- Potatoes
- Form the moist, starchy body of the stuffing that holds the bird's interior together.
- Onion
- Adds savory sweetness and aroma to the stuffing once softened by boiling.
- Butter
- Adds fat for richness and helps the skin brown during roasting.
- Flour
- Thickens the pan juices into gravy as it cooks with the drippings.
The step that matters
Once the oil is rendered, rub the duck with butter, sprinkle with flour, and add more hot water as needed.. Duck fat must render out before the skin can crisp, and adding hot water keeps the pan from scorching while the flour thickens the drippings into gravy.
Swap the onion
How well each one fits the dish's main ingredients (potato, pepper, thyme, butter, flour):
- Chivefits better
- Shallotfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against potato, pepper, thyme, butter, flour. 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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