In medium bowl, mix flour, baking powder and salt; set aside. In large bowl, beat butter, sugar and vanilla with electric mixer on high speed 3 minutes or until fluffy. Add eggs, one at a time, beating well after each addition. Alternately add flour mixture, about 1/2 cup at a time, and milk, about 1/3 cup at a time, beating until blended and scraping bowl occasionally. Pour batter into pan.