Vanilla Sponge Cake

Directions

1. 1
   Preheat oven to 350 degrees.
2. 2
   Grease a 9-inch springform pan. Line pan (including the sides) with parchment paper.
3. 3
   Sift flour and baking powder 3 times. Add in 1/4 tsp salt.
4. 4
   Throw raisins into flour mixture and coat them well. (optional step).
5. 5
   With an electric mixer, beat egg whites with cream of tartar and 1/8 tsp salt until stiff peaks are formed. Add in sugar and beat until stiff peaks form again.
6. 6
   Combine egg yolks, oil, water, and vanilla extract. Beat mixture until foamy.
7. 7
   Fold egg yolk mixture gently into egg whites. Add flour mixture and gently fold in until well-combined.
8. 8
   Pour cake batter into springform pan and bake for 30-40 minutes. The cake is done when top springs back when lightly pressed.