cooking time for large baked sweet potatoes
Instructions. 1  1. Preheat oven and wash the sweet potatoes: Preheat oven to 375Â°F. 2  3. Prick with a fork, wrap, and roast: Prick each sweet potato several times with a fork and wrap loosely in the foil. 3  4. Check for doneness: Depending on the size of your potatoes, it may take between 30 minutes to 1 hour for them to be done.