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 Goose and Duck
Ingredients
Directions
Prepare the potato and onion mash
Mash the boiled potatoes and onion together until light and lump-free.
Season the mash with salt, pepper, and butter.
Roast the bird
Roast the goose or duck slowly for 2 hours, basting frequently.
Half an hour before it is done, remove the bird from the oven.
Rub the bird with butter and salt.
Lightly dredge the bird with flour.
Return the bird to the oven to brown without basting.
Serve
Serve with gravy as for turkey and hot roasted sour apples or acid jellies.
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).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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
- Flour
- Forms a light coating on the skin that helps it brown and crisp.
- Butter
- Adds fat and richness, carrying flavour and helping the skin brown.
- Onion
- Adds aromatic flavour and moisture to the mash.
- Fresh boiled potatoes
- Provide the starchy body and smooth texture of the mash.
The step that matters
Return the bird to the oven to brown without basting. Basting during the final browning keeps the skin wet and pale, so it will not crisp. Leaving the surface alone lets dry heat brown the flour and fat into a crisp, golden skin.
Swap the onion
How well each one fits the dish's main ingredients (potato, pepper, butter, egg, flour):
- Chivefits better
- Asparagusfits better
- Spinachfits better
- Onionthe original
Fit is the average pairing score against potato, pepper, butter, egg, 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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