Prepare Sweet Potato: Peel and wash the sweet potato, then cut into 1 cm slices.
Steam Sweet Potato: Place the sweet potato slices in a steamer and steam for 25 minutes until soft.
Make Dough: Remove the steamed sweet potato and mash it. Add sugar, tapioca starch, and hot water, then mix well until a soft dough forms.
Shape Dough: Weigh the dough and form into round balls of about 7 to 10 grams each.
Fry Cakes: Heat plenty of oil in a pan. Fry each dough ball until crispy and golden. Use chopsticks to stir or lightly press the balls while frying to help air get in and create a round shape.
Serve: Serve the crispy sweet potato cakes hot, ideally dipped in milk.