Why it works: Pepper and sage match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 5,388 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Roasted Ducks
Ingredients
Directions
Prepare
Clean and truss the ducks like chickens.
In a bowl, mix bread crumbs, butter, grated onion, salt, and pepper to make the dressing.
Season the ducks inside and out with salt, pepper, and sage.
Roast
Place the ducks in a roasting pan with a little water and add bits of drippings on top.
Baste the ducks often as they cook.
Make the gravy and serve
Stew the giblets for the gravy.
Chop the giblets and pour off most of the fat from the pan.
Thicken the gravy with flour and season well.
Serve with stewed cranberries or apple sauce.
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 + sagetop 3% of all pairsSmell alikestrongCooked together5,388 recipes
Shared aroma: beta-phellandrene (minty, terpene).
-
Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + sagetop 12% of all pairsSmell alikemoderateCooked together3,628 recipes
Shared aroma: coumarin (sweet, hay).
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
- Ducks
- Provide the main meat, whose fat renders and bastes the bird as it roasts.
- Bread crumbs
- Form the bulk of the dressing, soaking up butter and onion juices to give a moist, soft stuffing.
- Butter
- Adds richness and fat to the dressing, carrying flavour and keeping the crumbs moist.
- Flour
- Thickens the pan drippings into a smooth gravy as it cooks with the liquid.
The step that matters
Pour off most of the fat from the pan. Duck releases a large amount of fat while roasting. Leaving too much in the pan makes the gravy greasy and can stop the flour from thickening it properly.
Swap the onion
How well each one fits the dish's main ingredients (bread, butter, pepper, sage, flour):
- Shallotfits better
- Capsicumfits better
- Sweet potatofits better
- Onionthe original
Fit is the average pairing score against bread, butter, pepper, sage, 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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