Preheat oven to 350º. Prepare fluted tube pan with vegetable pan spray.
In medium bowl, stir together flour, baking powder and salt.
In large bowl, beat butter and granulated sugar with electric mixer until light and fluffy. Add eggs one at a time, beating well after each addition. Add vanilla and beat until well combined. Add flour mixture and beat on low speed for 1 minute, scraping bottom and sides of bowl as needed. Pour batter into prepared pan.
Bake 50-55 minutes or until toothpick inserted in center comes out clean. Cool cake in pan on cooling grid 15 minutes. Loosen sides of cake and remove from pan; cool completely on grid. Dust with confectioners? sugar before serving.