無需烤箱的鹹蛋黃紫薯冰皮月餅，製作超簡單，放幾天都不會硬！Salted egg yolk purple sweet potato ice skin mooncake。

主要食材：紫薯3個，白糖40克，黃油20克，鹹蛋黃12個，糯米粉150克，玉米澱粉30克，白糖30克，牛奶200克，黃油10克，糯米粉少許。
Main ingredients: 3 purple potatoes, 40g white sugar, 20g butter, 12 salted egg yolks, 150g glutinous rice flour, 30g corn starch, 30g white sugar, 200g milk, 10g butter, and a little glutinous rice flour.