In large bowl, combine flour, sugar, baking powder and salt; stir to combine. Cut in butter with pastry blender or two knives until mixture resembles coarse crumbs. In small bowl, whisk milk, 1 egg and vanilla. Add to dry ingredients all at once, stirring to moisten. On well-floured surface, knead dough 5-10 times until it comes together. Shape into 8 in. round (about 1 in. thick); cut into 8 wedges.