SWISS ROLL WITH YAM PASTE - 芋头馅瑞士卷

Egg Whites 蛋白霜 :
Egg Whites 蛋白 4个
Castor Sugar 细砂糖 30g

Yolk Batter 蛋黄糊:
Egg Yolks 蛋黄 4个
Castor Sugar 细砂糖 35g
Milk 牛奶 60ml
Oil 色拉油 50ml
Cake Flour 低筋面粉 80g

Fillings 酸奶芋头馅:
Butter 黄油40g
Castor 糖粉10g
Yam Paste 芋头泥（蒸熟）120g
Yogurt 酸奶 35g

Method 做法：

Fillings 酸奶芋头馅做法：

1、Mix butter with castor sugar, till the sugar dissolved. 黄油充分软化，加入糖粉.
2、Beat until double size and colour turned lighter. 打至体积变大颜色变浅.
3、Add in yam paste and mix well. 加入蒸熟的芋头泥搅拌均匀.
4、Add in yogurt. 加入酸奶拌匀.
5、Mix well and set aside. 拌匀即为酸奶紫薯馅料，容器盖上盖子待用。

Swiss Roll 蛋糕片的制做：
1、Beat egg yolks with castor sugar. 蛋黄打散加入35克糖拌匀
2、Add milk in. 加入牛奶拌匀
3、Add oil until well mixed. 加入油搅打至完全融合
4、Sift flour in.分三次筛入面粉，切拌至完全无颗粒
5、Egg whites beat until soft peak. 蛋白用电动打蛋器分次加入白砂糖，打至湿性发泡，即提起打蛋器成弯角状

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