In a bowl, combine the flour, baking powder and salt.
Cut in butter until mixture resembles coarse crumbs.
Combine potatoes, milk and egg; stir into the crumb mixture until a soft dough forms. Turn onto a floured surface; knead gently 10-12 minutes or until no longer sticky. Gently pat or roll dough into a 9-in. circle about 3/4 in. thick.
Cut into 10-12 wedges. Separate wedges and place on an ungreased baking sheet.
Bake at 400° for 15-18 minutes or until golden brown.