紫薯相思蛋糕 Purple Sweet Potato Ogura Cake

相思啊相思！

最近FB烘焙世界的姐妹们都感染“相思病”，

一个接一个的都患上“相思苦”，

姐妹们都弄相思蛋糕来安慰自己，

看了开心吃了更温馨！

相思苦也变成了

开心乐透透。。。哈哈哈！

材料Ingredients: 

粟米油 45g corn oil

麵粉 70g cake flour 
发粉 1/2 teaspoon baking powder

鲜奶 80ml fresh milk 

全蛋 1 whole egg

蛋黄 5 eggs yolk
紫薯粉 1 teaspoon purple sweet potato power

蛋白 5 eggs white

砂糖 60g sugar 

塔塔粉 1/4 teaspoon cream of tartar

蛋黃和全蛋攪拌

再把粟米油和牛奶加入拌勻

加过筛麵粉和发粉拌勻至完全混合均勻

将蛋白打至湿性发泡后

加入塔塔粉和糖打至拿起搅拌器尾端呈现尖挺

先拌入1/3的蛋白霜进蛋黃面糊

然后再把面糊倒回剩余的蛋白霜里拌匀

取出1/3的面糊加入紫薯粉拌匀

将两个面糊分别加入烤盘

使用牙签或筷子画出你喜欢的图案

蒸烤法烤160度，烤大约40-45分钟 

cream the whole egg, egg yolk and sugar until fluffy

add in corn oil and milk mix well

fold in sifted flour with baking powder and mix until smooth

whist the egg white and cream of tartar until fluffy 

add in sugar and cream until stiffly 

add the some egg white mixture into the egg yolk mixture mix well

then pour all into the balance of egg white mixture and mix well

took out 1/3 mixture and add in the purple sweet potato powder & mix well

scoop in the two mixture into the baking pan

use the chopstick or toothpick to form the design

steam bake at 160C for about 40-45 minutes