Preheat oven to 350 degrees. With your electric mixer, mix the butter, sugar, eggs, and almond extract. In a separate bowl, gently combine the flour, baking powder, and salt. With the mixer on low speed, alternately add in the flour mixture and the milk mixture until just combined. Pour cake batter into a greased 9x13 cake pan, and bake for 30-35 minutes until a tester in middle comes out clean.