Why it works: Ketchup and sauce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,099 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
To Stew Ducks
Ingredients
Directions
Prepare the ducks
Lard the ducks on each side of the breast.
Dust the ducks with flour and brown them before the fire.
Stew
Place the ducks in a stew pan with water, red wine, walnut ketchup, browning sauce, anchovy, lemon, garlic, and sweet herbs.
Let the ducks stew slowly for 30 minutes or until tender.
Remove the ducks and keep them hot.
Finish the gravy and serve
Skim off the fat from the gravy and strain it through a fine sieve.
Add a few morels and truffles to the gravy and boil until reduced to about ½ pint.
Pour the gravy over the ducks and 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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Ketchup + saucetop 1% of all pairsSmell alikestrongCooked together1,099 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Sauce + anchovytop 2% of all pairsSmell alikemoderateCooked together2,057 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Ketchup + anchovytop 2% of all pairsSmell alikestrongCooked together479 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Red wine + clovetop 8% of all pairsSmell alikemoderateCooked together849 recipes
Shared aroma: ethyl cinnamate (sweet, balsamic).
-
Walnut + clovetop 9% of all pairsSmell alikestrongCooked together1,592 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Young ducks
- Provide the main meat, which becomes tender through slow stewing.
- Flour
- Dusting helps the duck surface brown and thickens the gravy slightly.
- Red wine
- Adds acidity and depth of flavour to the braising liquid and gravy.
- Walnut ketchup
- Contributes concentrated savoury, umami flavour to the gravy.
- Anchovy
- Dissolves into the liquid, adding savoury depth without a fishy taste.
- Lemon
- Adds acidity that brightens the rich gravy.
The step that matters
Browning the ducks before the stew. Browning floflour-dusted duck creates Maillard flavour and colour that carry into the gravy. Pale ducks give a flat, washed-out sauce, so the surface must be well browned before the liquid goes in.
Swap the lemon
How well each one fits the dish's main ingredients (flour, red wine, walnut, ketchup, sauce, anchovy, clove):
- Lemonthe original
- Limefits about as well
- Avocadofits about as well
- Grapefits less well
Fit is the average pairing score against flour, red wine, walnut, ketchup, sauce, anchovy, clove. 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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