Why it works: Onion and olive are a kitchen classic. They rank in the top 5% of all ingredient pairs, and 26,431 recipes mention both. Both carry ethyl butyrate, which smells apple, fruity. The science ↓
The recipe
Ingredients
Contains: wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Brown and build the gravy
Brown the duck and bacon in a pan, then remove them.
Stir in the flour until browned.
Gradually add the boiling water or stock and bring to a boil.
Add the bouquet, onion, salt, and pepper.
Simmer and serve
Return the duck and bacon to the pan, cover, and simmer on low heat.
Remove the stones from the olives and blanch them in boiling water for 3-4 minutes.
Add the olives to the duck and simmer for 5 minutes.
Serve the duck on a hot dish, surrounded by olives, and pour the strained gravy over it.
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 aroma chemistry they share, and how many recipes mention both.
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Onion + olivetop 5% of all pairsAroma overlapmoderateMentioned together26,431 recipes
Shared aroma: ethyl butyrate (apple, fruity).
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Olive + peppertop 6% of all pairsAroma overlapstrongMentioned together27,398 recipes
Shared aroma: 2-heptenal (green).
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Onion + peppertop 6% of all pairsAroma overlapmoderateMentioned together68,463 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + peppertop 13% of all pairsAroma overlaplowMentioned together49,477 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + oniontop 13% of all pairsAroma overlaplowMentioned together31,198 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and pepper share little aroma chemistry, yet 49,477 recipes mention both: they likely 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 turns tender and flavourful during slow simmering.
- Bacon
- Adds savoury fat and smoky flavour that seasons the duck and gravy.
- Flour
- Browned in the pan, it thickens the gravy and adds nutty colour.
- Olives
- Add salty, briny flavour that cuts the richness of the duck and gravy.
The step that matters
Simmering the duck on low heat. Gentle, low heat lets the tough connective tissue in duck break down slowly, keeping the meat tender. A hard boil toughens the meat and can make the gravy cloudy or greasy.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (flour, olive, pepper):
- Capsicumbetter flavor fit
- Tomatobetter flavor fit
- Eggplantbetter flavor fit
- Onionthe original
Fit is the average pairing score against flour, olive, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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