This is a simple recipe for sweet potato balls using just four ingredients (sweet potato, milk, sugar, and potato starch), and without eggs, butter, or wheat flour. No cookie cutters, straining, or mixers are needed; simply roll them into balls and fry them. They feature a crispy yet chewy texture and the gentle sweetness and aroma of sweet potatoes. The key is to adjust the consistency with milk and potato starch to prevent the dough from cracking, and to fry them slowly at a low temperature to prevent burning. This is an easy snack that even beginners can enjoy.