Preheat oven 350°F

Combine flour, baking powder, and salt then stir. Set it aside

Beat butter and sugar in a large bowl until fluffy

Add egg whites two at a time

Add vanilla then beat until blended

Add flour mixture alternately with milk, beating well after each addition

Line the bottom of pans with waxed paper, then grease them

Pour batter evenly into prepared pans

Bake 25minutes OR until toothpick inserted into center comes out clean

Cool layers in pans on wire rack for 10minutes