INGREDIENTS
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One 12-pound turkey, rinsed and dried
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Kosher salt and black pepper
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3 tablespoons olive oil
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8 tablespoons (1 stick) unsalted butter, at room temperature
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1/4 cup chopped fresh herbs (a mix of rosemary, sage, oregano and thyme)
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2 stalks celery, chopped
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2 leeks, chopped
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1 medium yellow onion, chopped
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1/3 cup flour
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1 cup cognac
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8 cups chicken stock or broth, plus more as needed