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 ↓
Stewed Ducks
Ingredients
Directions
Prepare the duck
Season the jointed duck with pepper, salt, and flour.
Heat dripping in a frying pan and fry the sliced onion until light brown.
Remove the onion and add the duck, cooking for 10 minutes, turning two or three times.
Stew and finish
In a saucepan, place the cold stock or consommé and add the jointed duck.
Cover and stew slowly until tender.
Season with pepper, salt, tomato ketchup, and lemon juice. Simmer for three minutes.
Stir in the brown roux and cook for one minute to thicken.
Add the sherry.
Serve.
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).
-
Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + lemontop 11% of all pairsSmell alikemoderateCooked together4,592 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Duck
- Provides the meat that becomes tender through slow stewing in liquid.
- Flour
- Coats the duck pieces, helping to brown them and thicken the cooking liquid.
- Onion
- Browned first to add sweetness and savoury depth to the sauce.
- Stock or consommé
- Forms the moist cooking liquid that tenderises the duck and becomes the sauce.
- Brown roux
- A cooked flour and fat mixture that thickens the sauce and adds richness.
- Sherry
- Adds acidity and aromatic flavour to the finished sauce.
The step that matters
Stewing slowly until tender. Gentle heat lets connective tissue in the duck break down without the meat toughening or the liquid boiling away. Rushing with a hard boil leaves the meat tough and can make the sauce reduce unevenly.
Swap the onion
How well each one fits the dish's main ingredients (pepper, flour, tomato, ketchup, lemon, sherry):
- Capsicumfits better
- Shallotfits better
- Arrowrootfits better
- Onionthe original
Fit is the average pairing score against pepper, flour, tomato, ketchup, lemon, sherry. 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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