Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
To Stew a Wild Duck
Ingredients
Directions
Prepare the duck
Draw and truss the duck as for boiling.
Season the inside with salt and pepper.
Place the duck in a stew pan with a little soup and let it stew for a few minutes.
Remove the duck and make two cuts on each side of the breastbone.
Dredge the cuts with salt and pepper.
Make the sauce and stew
Skim the fat off the sauce and thicken it with butter rolled in flour, ketchup, and port wine.
Return the duck to the pan, breast down, and stew until tender.
Before serving, squeeze in a little lemon juice.
Serve
Dish the duck and pour the sauce over it; garnish with sliced lemon.
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 + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Port wine + buttertop 13% of all pairsSmell alikemoderateCooked together1,499 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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Ketchup + flourtop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Ketchup + port winetop 15% of all pairsSmell alikelowCooked together425 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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
- Wild duck
- Forms the main body of the stew and provides the meat that becomes tender through slow stewing.
- Butter and flour
- Form a roux-style paste that thickens the sauce and gives it a smooth, body-rich texture.
- Port wine
- Adds sweetness and depth of flavour to the sauce as it reduces.
- Ketchup
- Adds tangy sweetness and savoury depth to the sauce.
- Lemon
- Adds acidity that brightens the rich, fatty sauce.
The step that matters
Skim the fat off the sauce before thickening. Wild duck carries a lot of fat under the skin and in the cooking liquid. Removing it before thickening keeps the sauce clean-tasting and prevents a greasy, heavy texture.
Swap the lemon
How well each one fits the dish's main ingredients (pepper, ketchup, port wine, butter, flour):
- Lemonthe original
- Red currantfits about as well
- Figfits less well
- Limefits less well
Fit is the average pairing score against pepper, ketchup, port wine, 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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