Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
To Roast a Canvasback Duck
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Pluck, singe, draw, and wipe the duck well. Do not wash it.
Season the duck with coarse sea salt and cayenne pepper.
Roast
Roast the duck in a 400°F (200°C) oven for 30 minutes, basting with butter and a little water.
Transfer the duck to a hot platter.
Make the gravy and serve
Add currant jelly and a dash of cayenne pepper to make gravy.
Thicken the gravy with browned flour if desired.
Serve immediately after roasting.
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.
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + curranttop 17% of all pairsSmell alikemoderateCooked together7,856 recipes
Shared aroma: isoamyl acetate (banana, pear).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Currant + flourtop 26% of all pairsSmell alikelowCooked together8,077 recipes
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
- Canvasback duck
- Provides the main meat and the fat that renders during roasting.
- Butter
- Adds fat and richness, and helps the skin brown while basting.
- Currant jelly
- Adds sweetness and fruity acidity that balances the rich duck drippings in the gravy.
- Browned flour
- Thickens the gravy and adds a toasted, nutty flavour.
The step that matters
Serve immediately after roasting. Duck fat begins to set and the skin loses its crispness as it cools, so the bird is best carved and served while hot.
Swap the currant
How well each one fits the dish's main ingredients (pepper, butter, flour):
- Lemonfits better
- Limefits better
- Raisinfits better
- Currantthe original
Fit is the average pairing score against pepper, 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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