Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
To Hash Ducks
Ingredients
Directions
Prepare the duck
Cut the cold duck into joints.
Warm the duck in gravy and port wine without boiling.
Make the sauce
Dice the onion and fry it in butter without letting it color.
Add enough boiling water to the pan to make sauce for the hash.
Thicken the sauce with a little flour.
Add the duck to the sauce to warm it, without boiling.
Season with pepper, salt, and catsup.
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.
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Port wine + buttertop 13% of all pairsSmell alikemoderateCooked together1,499 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Duck
- Provides the main meat, which is gently warmed so it stays tender rather than tough.
- Flour
- Thickens the sauce so it clings to the duck and onion instead of running thin.
- Butter
- Fat for frying the onion, adding richness and carrying flavor through the pan.
- Onion
- Adds savory sweetness and aroma as it softens in butter.
- Port wine
- Adds depth and a touch of sweetness to the warmed sauce.
The step that matters
Warm the duck without boiling. Boiling toughens muscle proteins and makes the meat dry and stringy, so the duck should only be heated gently in the sauce.
Swap the onion
How well each one fits the dish's main ingredients (port wine, butter, flour, pepper):
- Shallotfits better
- Capsicumfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against port wine, butter, flour, pepper. 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.
More duck hash recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes