Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Ragout of Duck and Green Peas
Ingredients
Directions
Prepare the duck broth
Cut the meat from the duck carcasses into neat slices.
Stew the bones in 1 quart of water.
Cool the broth. Skim the broth. Season the broth.
Make the gravy and peas
Combine the gravy (or prepared broth) with the duck pieces in a saucepan. Heat the mixture without boiling.
Cook the green peas in boiling water for 20 minutes. Drain the peas. Season the peas with pepper, salt, and butter.
Thicken the gravy with a little browned flour mixed with cold water. Boil the thickened gravy briefly.
Serve
Remove the duck from the saucepan. Arrange the duck in the center of a dish.
Surround the duck with the peas like a green hedge.
Pour the gravy over the meat.
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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Peas + peppertop 15% of all pairsSmell alikemoderateCooked together5,331 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Peas + buttertop 16% of all pairsSmell alikemoderateCooked together4,887 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Meat + buttertop 16% of all pairsSmell alikemoderateCooked together7,594 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Meat + peastop 18% of all pairsSmell alikemoderateCooked together573 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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 meat
- Forms the main body of the dish, providing the savory meat that the gravy coats.
- Browned flour
- Thickens the gravy so it clings to the meat, and adds a toasted, nutty flavor.
- Green peas
- Add sweetness, color and a soft texture that contrasts with the tender duck.
- Butter
- Adds richness and a smooth mouthfeel to the seasoned peas.
The step that matters
Heat the duck gravy without boiling. Gently heating the meat in the gravy keeps the duck tender and stops the proteins from tightening and toughening. Boiling would make the meat dry and chewy.
Swap the peas
How well each one fits the dish's main ingredients (meat, pepper, butter, flour):
- Almondfits better
- Walnutfits better
- Chestnutfits better
- Peasthe original
Fit is the average pairing score against meat, pepper, butter, flour. 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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