Combine dry ingredients in mixing bowl; cut in butter with pastry blender until mixture resembles coarse meal. Add buttermilk; mix quickly and only until dough leaves edge of bowl. Scoop dough, with rubber scraper, into greased 9-inch round pan. With floured knife, cut across top of dough, then cut again at right angle. Bake in preheated 375 F oven until golden brown and loaf sounds hollow when tapped (35-40 minutes). Cool on rack; serve slightly warm or cool.

To Cut: Break bread at quarter lines; slice each quarter.