Why it works: Pepper and olive match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and 27,398 recipes mention both. Both carry 2-heptenal, which smells green. The science ↓
The recipe
Ingredients
Contains: milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare
Cut the duck legs and wings into neatly shaped pieces.
Make the sauce
In a saucepan, melt the butter over medium heat.
Stir in the flour and cook until brown.
Gradually add the broth, stirring until smooth.
Boil until thickened, then season with salt and pepper.
Serve
Add olives 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 aroma chemistry they share, and how many recipes mention both.
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Pepper + olivetop 6% of all pairsAroma overlapstrongMentioned together27,398 recipes
Shared aroma: 2-heptenal (green).
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Butter + flourtop 6% of all pairsAroma overlaplowMentioned together122,858 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + olivetop 7% of all pairsAroma overlapstrongMentioned together10,128 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Butter + peppertop 11% of all pairsAroma overlapstrongMentioned together85,512 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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Flour + peppertop 13% of all pairsAroma overlaplowMentioned together49,477 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour share little aroma chemistry, yet 122,858 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
- Butter
- Enriches the sauce with fat and adds a rich, savoury flavour.
- Flour
- Thickens the broth into a smooth sauce as it cooks.
- Broth
- Forms the liquid base of the sauce, which thickens as it boils.
- Olives
- Add a salty, briny flavour that cuts through the richness of the duck.
The step that matters
Cooking the flour in the butter. Cooking the flour until brown in the melted butter builds flavour and helps prevent lumps, so the sauce stays smooth when the broth is added gradually.
“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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