Sweet potato Crystal Cake。軟糯Q彈的紅薯水晶餅，晶瑩剔透，簡單又美味！

水晶餅是廣東的一道小吃，茶樓的早餐最常見，晶瑩剔透，餡料有紫薯味、豆沙味、蓮藕味、還有綠豆等等。我們這次做成紅薯味的，這種水晶餅小朋友和老人最喜歡吃，甜而不膩，軟糯Q彈，非常好吃。
主要食材：澄粉100克，玉米澱粉20克，清水150克，白糖20克，玉米油20克。
餡料食材：紅薯250克，白糖40克，黃油20克。
Crystal cake is a snack in Guangdong. Breakfast in teahouses is the most common. It is crystal clear. The fillings are purple potato, bean paste, lotus root, mung bean and so on. We made this sweet potato cake. It's a favorite for children and old people. It's sweet but not greasy. It's soft and glutinous q-ball. It's very delicious.
Main ingredients: 100g wheat starch, 20g corn starch, 150g water, 20g sugar, 20g corn oil.
Ingredients: 250 grams of sweet potato, 40 grams of sugar, 20 grams of butter.