Blueberry Cake Roll
1.
Separate egg white and yolk
2.
Add milk and corn oil to the egg yolk and mix well
3.
Add 2 grams of baking powder to the egg white, then add a small amount of white vinegar, add sugar in three times
4.
After the egg whites are beaten, add them to the previously mixed batter in portions
5.
Add to the batter and mix well
6.
Pour the mixed batter into the baking pan and gently shake the baking pan to avoid excessive bubbles. Put the baking pan in the preheated oven and bake at 170 degrees for 30 minutes.