紫薯水晶糕的做法，外皮晶瑩Q彈，內陷綿密香甜，非常的簡單又好吃！Purple Potato Crystal Cake。

減脂期也能放心炫的紫薯水晶糕，低脂低糖高纖維，飽腹感超強，真的太美味了！
主要食材：紫薯300克，白糖40克，黃油20克，澄粉120克，糯米粉50克，沸水180克，植物油20克。
Even during the weight loss period, you can rest assured of the dazzling purple sweet potato crystal cake, which is low-fat, low sugar, high fiber, and has a super satisfying feeling. It's really delicious!
Main ingredients: 300g purple potatoes, 40g white sugar, 20g butter, 120g wheat starch, 50g glutinous rice flour, 180g boiling water, 20g vegetable oil.