Yes. You can use this method to cook frozen sweet potatoes in the air fryer. To do this you will use them straight out of the freezer (do not thaw them). These are often diced a little smaller so you will need about 2 to 3 cups of frozen sweet potatoes and the cooking time and instructions will be about the same (15 minutes) since they are frozen. You may find you need to add a touch more oil to aid in crisping.