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1
Preheat oven to 450u00b0F. Arrange 3 1/2 pounds turkey wings and 1 turkey neck (optional) on a rimmed baking sheet and roast, turning turkey halfway through, until golden brown, about 45 minutes.
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2
Transfer wings and neck to a stockpot. Pour off fat from baking sheet; discard. Pour 2 cups water onto baking sheet. Scrape up any browned bits with a wooden spoon. Pour liquid from sheet into pot with turkey. Add 1 chopped large onion, 1 peeled and chopped large carrot, 1 chopped celery stalk, 4 sprigs parsley, 4 sprigs thyme, 12 whole peppercorns, 1 bay leaf, and 10 cups water. Bring to a simmer; reduce heat to low and simmer gently until stock is reduced by at least one-third, about 4 hours.
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3
Strain stock through a fine-mesh sieve into a clean saucepan. If you have more than 6 cups stock, simmer uncovered over medium heat until reduced to 6 cups. Let cool. Pour stock into an airtight container; cover and chill. DO AHEAD:
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4
Melt 1/3 cup unsalted butter in a small skillet over medium heat. Whisk in 1/3 cup all-purpose flour. Reduce heat to low; whisk until roux is golden brown, about 2 minutes. DO AHEAD:
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5
Bring 6 cups Make-Ahead Turkey Stock to a boil in a large saucepan over medium heat. Add 1-2 cups skimmed and strained roast turkey drippings. (If you're short on drippings, skim fat from pan and add 1-2 cups water. Scrape up browned bits with a wooden spoon; strain liquid into stock.) Season to taste with kosher salt and freshly ground black pepper. Whisk in roux. Reduce heat to low; simmer gently for 5 minutes for gravy to thicken and flavors to meld. You're done!
