Ingredients
12 tablespoons (1 1/2 sticks) unsalted butter, softened
1 1/2 cups sugar
2 cups all-purpose flour
2 teaspoons baking powder
1/4 teaspoon salt
6 large egg whites (3/4 cup)
3/4 cup milk
2 teaspoons vanilla extract
1 (13 x9) baking pan, greased with shortening
Preparation
