Why it works: Sage and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 5,388 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Roast Duck
Ingredients
Directions
Prepare
Prepare the duck for roasting.
Chop the onions finely and soak them in cold water.
Stuff and bake
Mix the drained onions with sage, bread crumbs, butter, salt, and pepper.
Stuff the duck with the mixture.
Bake the duck for one hour.
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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Sage + peppertop 3% of all pairsSmell alikestrongCooked together5,388 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + sagetop 12% of all pairsSmell alikemoderateCooked together3,628 recipes
Shared aroma: coumarin (sweet, hay).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Duck
- Is the main protein; its fat renders during roasting, keeping the meat moist and crisping the skin.
- Onions
- Soaking softens their sharp bite, and they add moisture and sweetness to the stuffing.
- Bread crumbs
- Absorb juices and butter, giving the stuffing body and helping it hold together.
- Butter
- Adds fat and richness, helping the stuffing taste savoury and brown lightly.
The step that matters
Soaking the onions. Soaking chopped onions in cold water mellows their sharp sulphur compounds, so the stuffing tastes sweeter. Drain them well, since excess water would make the stuffing soggy.
Swap the onion
How well each one fits the dish's main ingredients (sage, bread, butter, pepper):
- Capsicumfits better
- Shallotfits better
- Carrotfits better
- Onionthe original
Fit is the average pairing score against sage, bread, butter, 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.
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