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 very quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Wash and dry the duck thoroughly.
Prepare the stuffing by mixing mashed potatoes with fried onion and shredded bacon. Season the stuffing with salt and pepper.
Stuff the duck with the mixture.
Roast
Bake the duck in a preheated oven at 400°F (200°C) for 45 minutes.
Baste the duck with water mixed with sliced orange and Madeira wine.
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).
-
Pepper + orangetop 10% of all pairsSmell alikestrongCooked together2,402 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + orangetop 11% of all pairsSmell alikemoderateCooked together537 recipes
Shared aroma: beta-damascenone (apple, rose).
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 fat that render and brown during roasting.
- Mashed potatoes
- Absorb rendered duck fat and juices, keeping the stuffing moist and soft.
- Bacon
- Adds smoky, salty fat that flavours the stuffing as it cooks.
- Onion
- Adds sweetness and savoury depth when fried until brown.
- Madeira wine
- Adds sweet, fortified depth to the basting liquid as it reduces and browns.
The step that matters
Baste the duck with water mixed with sliced orange and Madeira wine.. Duck skin holds a lot of fat, and the basting liquid helps keep the surface from drying and scorching while sugars in the wine and orange brown gently, so the sauce base is not burnt.
Swap the orange
How well each one fits the dish's main ingredients (potato, onion, pepper, madeira wine):
- Limefits better
- Lemonfits better
- Cherryfits about as well
- Orangethe original
Fit is the average pairing score against potato, onion, pepper, madeira wine. 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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