COMBINE first 5 ingredients; cut in butter with a pastry blender until mixture is crumbly. Add buttermilk and egg, stirring just until moistened.
TURN dough out onto a lightly floured surface; knead 5 or 6 times. Divide dough in half, and roll or pat each portion into a 6-inch circle. Cut into 8 wedges, and place 1 inch apart on lightly greased baking sheets. Brush with milk, and sprinkle with 1 tablespoon sugar.
BAKE at 425 degrees F for 12 to 15 minutes or until scones are golden brown.
YIELD: 16 servings.