Keep in mind that these times work best for, as mentioned, a thawed turkey that has.

How long to cook a 20 pound turkey in an electric oven. Here's how long it takes to cook a fully thawed turkey. Preheat oven to 325° f. 13 minutes of cooking time for each pound of turkey if roasting empty and 15 minutes per pound if stuffed.

Cook 2 3/4 to 3 hours at 325°f ; Preheat oven to 425 degrees. Cover the roaster and cook at 400 degrees for 30 minutes.

What temperature should the turkey be? You can start checking the internal temperature a bit sooner than that though, and for that you'll need a trusty digital. Bake turkey using the chart below.

Here are timetables for turkey roasting based on a 325 f oven temperature: Simply turn the roaster down to 325 degrees thereafter. Reduce the temperature to 325°f and continue cooking until the turkey registers 180°f in the thigh and 165°f in the breast.

At least 30 minutes before roasting turkey, adjust oven rack. Cover and turn the roaster on to its highest heat setting (or 450°f) for 30 minutes. Roast at 350 degrees for 3 hours and 10 minutes.

For a 20 lb turkey, this would mean a total cooking time of around 5 hours. Place on a cooking tray. It's a good idea to keep a meat thermometer handy while waiting for your turkey to finish frying.