Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Roast Ducks
Ingredients
Directions
Prepare the ducks
Clean the ducks by washing the inside in three waters, the second with baking soda.
Plunge the ducks into ice-cold water for 15 minutes.
Wipe the ducks inside and out.
Stuff the ducks with dry bread crumbs seasoned with salt, pepper, onion juice, and parsley, without moistening the stuffing.
Dredge the ducks in salted and peppered flour.
Place the ducks on a roasting rack.
Roast and baste
Pour 1 cup of boiling water over the ducks.
Roast the ducks covered for 12 to 15 minutes per pound.
Baste the ducks four times with the gravy from the dripping pan.
Uncover the ducks.
Wash the ducks with butter.
Dredge the ducks with flour.
Brown the ducks.
Make the gravy
Drain the pan liquor.
Set the pan liquor in ice water to separate the grease.
Strain the liquid.
Add finely minced giblets.
Thicken the gravy with browned flour.
Boil the gravy for 2 minutes.
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 + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- The main protein; cleaning, stuffing and roasting shape the final dish.
- Dry bread crumbs
- Absorb juices and flavor the stuffing while staying dry for a crisp, well-cooked interior.
- Flour
- Dredging coats the skin, helping it brown and crisp during roasting.
- Butter
- Adds fat to the skin, promoting richer browning and a golden color.
- Browned flour
- Thickens the gravy and adds a toasted, nutty flavor and color.
- Giblets
- Finely minced, they add savory depth to the gravy.
The step that matters
Separating the grease from the pan liquor. Chilling the pan liquor in ice water lets fat solidify on top so it can be removed, keeping the gravy from tasting greasy and letting it thicken cleanly.
Swap the onion
How well each one fits the dish's main ingredients (bread, pepper, parsley, flour, butter):
- Shallotfits better
- Carrotfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against bread, pepper, parsley, flour, butter. 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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