自製紫薯粉 Homemade Purple Sweet Potato Powder

6. When the purple mashed potatoes become crisp paper-like andiseasy to peel off the non-stick baking paper, itisdone.

6。當紫薯泥呈脆薄的紙張狀，可整塊從不沾烤紙分離時，就表示已烤乾了。