红薯别再蒸着吃了，加入一个鸡蛋，做成发糕，松软香甜，简单又美味！
主要食材：红薯300克，鸡蛋一个，牛奶200克，面粉250克，白糖40克，酵母粉3克，食用油20克。
Stop steaming sweet potatoes. Add an egg to make a cake. It's soft, sweet, simple and delicious!
Main ingredients: 300g sweet potato, one egg, 200g milk, 250g flour, 40g sugar, 3G yeast powder and 20g edible oil.