Turkey and Gravy for a Crowd | America's Test Kitchen

Ingredients

• 3 onions, chopped
• 4 celery ribs, chopped
• 4 carrots, peeled and chopped
• 10 garlic cloves, crushed and peeled
• 3 tablespoons unsalted butter, melted, plus extra as needed
• 3 bay leaves
• 10 sprigs fresh thyme
• 10 sprigs fresh parsley
• 1 tablespoon black peppercorns
• 4 cups chicken broth
• 1 cup water
• 1 cup dry white wine
• 4 (1½- to 2-pound) turkey leg quarters, trimmed
• 3 tablespoons kosher salt
• 1/2 cup all-purpose flour
• 2 (5- to 6-pound) bone-in turkey breasts, trimmed
• 2 tablespoons plus 2 teaspoons kosher salt, divided
• 7 tablespoons unsalted butter, melted, divided