Classic White Cake

Directions

1. 1
   Butter two 9-inch diameter by 1 1/2-inch deep layer pans or 1 (13 by 9 by 2-inch) pan.
2. 2
   Lined bottoms with parchment or waxed paper.
3. 3
   Set a rack at the middle level of the oven and preheat to 350 degrees.
4. 4
   In a large mixing bowl, beat butter and sugar for about 5 minutes, until light and fluffy.
5. 5
   Stir together flour, baking powder and salt.
6. 6
   Set aside.
7. 7
   Combine egg whites, milk and vanilla extract.
8. 8
   Add 1/3 of the flour mixture to butter mixture then add half the milk mixture.
9. 9
   Continue to alternate beginning and ending with flour mixture.
10. 10
    Scrape bowl and beater often.
11. 11
    Pour batter into prepared pan (s) and smooth top with a metal spatula.
12. 12
    Bake cake (s) about 25 to 30 minutes, or until a toothpick inserted in the center emerges clean.
13. 13
    Cool in pan on a rack for 5 minutes, then turn out onto a rack, remove paper and let cool completely.