1 Wash the sweet potato and dry it. Adjust the oven to 200 degrees and preheat it for 2 minutes. Put the sweet potatoes in the middle layer of the oven, leaving a gap between them to avoid uneven heating.

2. Adjust the temperature to 250 degrees and bake for about 20 minutes. After hearing the prompt, unplug the power supply and continue baking by using the residual temperature of the oven 15 minutes.

3. After 15 minutes, the baked sweet potato is finished.