Sift dry ingredients in a bowl. Add room temperature butter and cut into the dry ingredients with a fork until the mixture resembles dry breadcrumbs. Add buttermilk and mix. The dough will be a bit moist. Roll half the dough into a ball and flatten on floured surface. Cut into six pieces with a scone cutter or simply cut into wedges. Repeat with the remaining dough.
Place on ungreased baking sheet and bake for 12 minutes. You can brush buttermilk on top and sprinkle with sugar before baking if desired.