Preheat oven to 425ºF. Grease a cookie sheet.
Combine dry ingredients in a large mixing bowl. Work butter or margarine into dry ingredients until butter is the size of small peas using a pastry blender or fork. Add remaining ingredients, mixing just until dry ingredients are moist.
Turn dough onto a lightly-floured surface and gather into a ball. Pat into a circle 3/4-inch thick; cut into 8 wedges. Place on cookie sheet. Sprinkle with sugar.
Bake 15 to 18 minutes or until light golden brown.