簡單零失敗的廣式雞蛋鬆糕教程，口感特別鬆軟香甜，入口綿軟溼潤不發乾，真的超好吃！Egg Steamed Chinese sponge cake。

主要食材：溫水20克，耐高糖酵母粉3克，雞蛋4個，牛奶150克，白糖80克，吉士粉10克，麵粉200克，木薯澱粉50克，黃油20克，無鋁泡打粉3克。
Main ingredients: 20 grams of warm water, 3 grams of high sugar resistant yeast powder, 4 eggs, 150 grams of milk, 80 grams of white sugar, 10 grams of custard powder, 200 grams of flour, 50 grams of cassava starch, 20 grams of butter, and 3 grams of aluminum free baking powder.