An overnight brine for any Thanksgiving turkey is key. A brine bag and large container or pot will help in your prep. Make sure your turkey is properly thawed before brining. If you don't have room in your refrigerator for turkey brining, use a cooler with ice to place the turkey in. This recipe is for a 15 pound turkey, adjust your cooking time if using a larger or smaller bird. At 325 degrees F roast the turkey for about 15 minutes per pound until a meat thermometer reads 165 degrees F.