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 ↓
Dressed Ducks, or Geese Hashed
Ingredients
Directions
Make the sauce
In a stew-pan, melt the butter and fry the diced onion until soft but not browned.
Add boiling water to the pan to create a sauce for the hash.
Thicken the sauce with flour, stirring until smooth.
Finish and serve
Add the duck pieces to the sauce to warm them without boiling.
Season with pepper, salt, and ketchup before serving.
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).
-
Flour + ketchuptop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
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
- Onion
- Softened in butter to build a sweet, mild base for the sauce.
- Butter
- Fat that softens the onion and carries flavour into the sauce.
- Flour
- Thickens the boiling water into a smooth sauce that clings to the duck.
- Duck
- Cooked meat that provides the main substance and rich flavour of the hash.
The step that matters
Add the duck without boiling. Once the duck is in the sauce, boiling can toughen cooked meat and make it dry and stringy. Gentle heat only warms it through while keeping it tender.
Swap the onion
How well each one fits the dish's main ingredients (butter, flour, pepper, ketchup):
- Capsicumfits better
- Shallotfits better
- Turnipfits better
- Onionthe original
Fit is the average pairing score against butter, flour, pepper, ketchup. 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