Preheat oven to 350°F. Spray pan with vegetable pan spray. In bowl, sift together flour, baking powder and salt. In large bowl, cream butter and sugar together with electric mixer until light and fluffy. Add eggs and vanilla; mix well. Add flour mixture alternately with milk, beating well after each addition. Continue beating one minute. Pour into prepared pan.
Bake 45-50 minutes or until toothpick inserted in center comes out clean. Cool 15 minutes. Remove from pan; cool completely.
Decorating Tip: Dust with confectioners' sugar or cake sparkles. Achieve great cake definition using either a yellow or chocolate cake mix.