How Long To Cook A 20 Pound Turkey At 300. Herbs lemons and onions give your turkey flavor and keep it moist. Make sure it is placed evenly over the burners and the temperature should be at about 300 to 325 degrees.
When you re ready to start cooking preheat the oven to 325ºf. Remove the foil from the turkey. Don t stress about the math just follow our easy chart for how long to cook a turkey with recommendations from the usda.
If you want to cook the turkey overnight at 225f you ll probably want a bird that is 20 pounds or more so you can set your alarm for 8 hours after you put the turkey in the oven.
Your recipe may call for a different temperature and overall time and your oven may run hotter or cooler. Make sure there is room above the turkey. Remove the foil from the turkey. Slow roast the turkey at 300f.
