2. Peel the potatoes, cut them into slices, put them in a plate and steam them in a pot. Put the steamed potato chips into a fresh-keeping bag and press them into mud with a rolling pin. Pour the pressed mashed potatoes into a dish, add milk powder, sugar and a little milk, mix well and knead them into small balls by hand. Prepare bread crumbs, roll the prepared potato balls in a bread crumb bowl, and make them ready for use in turn. After the oil pan is heated to 50% to 60%, put the potato balls into the pan, fry them on low heat until the surface is golden, and then take them out.