You cook sweet potatoes by washing the tubers thoroughly, piercing their skins with a fork, and roasting them in an oven preheated to four hundred degrees Fahrenheit for forty five to sixty minutes. Alternatively, you can boil cubed sweet potato chunks in salted water for fifteen to twenty minutes until fork tender, or microwave a whole pierced potato for about six minutes. Each cooking method brings out the natural sweetness and smooth texture of the root vegetable. Choosing your preferred cooking style depends on whether you want roasted wedges, tender mash, or a soft baked potato.