Let’s get started!Preheat oven to 350ºF. Grease and line three six-inch round cake pans.In a medium bowl, whisk together flour, baking powder, and salt.In a large bowl, use an electric mixer to beat butter, shortening and sugar until light and fluffy.
Add egg whites one at a time, beating well after each addition. Beat in vanilla and almond extracts.On low speed, alternate adding the flour mixture and milk to the butter mixture, beginning and ending with the flour. Divide batter evenly between cake pans bake for 30 to 35 minutes.Once cakes are fully cooled, level them with a cake leveler.