Vanilla Sponge Cupcake

Directions

1. 1
   Heat the oven to 170 degrees Celcius and line cupcake pans.
2. 2
   Sift cake flour and baking powder together. Set aside.
3. 3
   Whisk egg white until its frothy, gradually add sugar while whisking in the highest speed.
4. 4
   Add egg yolks one at a time while whisking, then the softened butter and vanilla.
5. 5
   Gradually add cake flour and baking powder mixture. Continue mixing until texture is well combined and smooth.
6. 6
   Pour mixture into cupcake pans and bake for 12-15 minutes.