Super Soft & Fluffy Butter Sponge Cake 烫面牛油蛋糕

Ingredients  用料

(A)

35g butter 用料牛油
35g milk 牛奶
10g granulated sugar 糖
2 large, egg yolks, cold 蛋黄 (冷)
1/2 tsp vanilla extract 香草精
35g cake flour 低筋面粉
a pinch of sea salt 一小撮海盐

(B)
2 large, egg whites, cold 蛋白 (冷)
1/4 tsp cream of tartar or 1/2 tsp distilled vinegar 塔塔粉 / 醋
35g granulated sugar, optional 糖

Preheated oven 150ºC and hot water bath, steam bake with both top and bottom heat without fan assisted for about 45 minutes. 热水浴 150ºC  预热烤箱 上下火烤45分钟。

Keep an eye on it until done. Leave the cake in the oven for about 5-10 minutes. 如果要使蛋糕顶部上色。打开上风扇烤几分钟。仔细注意直到完成。蛋糕烤好后，先不要急着打开烤箱门，让蛋糕在烤箱中静置5-10分钟

Helpful Tips: 

Using an oven thermometer inside whilst baking is important. 一定要使用烤箱温度计, 它帮助了解烤箱真正的温度, 是非常重要的。

Recipe Source: Josephine's Recipes

For more details please check out video down below.
详细做法请点击以下影片参考。