Purple potato cold cake。超级好吃的紫薯小凉糕，软糯香甜，好吃不腻！

糯米凉糕是一道适合夏天食用的传统糕点。软糯清甜，裹着馅料，吃上一口棉软不粘牙，沙甜而不腻！做法也非常的简单！ 糯米皮食材：糯米粉150克，玉米淀粉20克，牛奶220克，黄油20克。 馅料食材：紫薯300克，白糖20克，黄油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.