Purple potato cold cake。超級好吃的紫薯小涼糕，軟糯香甜，好吃不膩！

糯米涼糕是一道適合夏天食用的傳統糕點。軟糯清甜，裹著餡料，吃上一口棉軟不粘牙，沙甜而不膩！做法也非常的簡單！
糯米皮食材：糯米粉150克，玉米澱粉20克，牛奶220克，黃油20克。
餡料食材：紫薯300克，白糖20克，黃油15克。
Glutinous rice cold cake is a traditional cake suitable for summer consumption. Soft waxy and sweet, wrapped in stuffing, eat a mouthful of cotton, soft and non stick teeth, sand is sweet but not greasy! The practice is also very simple!
Glutinous rice skin ingredients: 150g glutinous rice flour, 20g corn starch, 220g milk and 20g butter.
Stuffing ingredients: 300g purple potato, 20g white sugar and 15g butter.