Preheat oven to 450ºF. In the bowl of a food processor, combine the dry ingredients. Cut the butter into tablespoon size pieces and add to flour mixture. Pulse until mixture resembles fine meal (or if you don’t have a food processor, use a pastry blender or 2 butter knives to cut in the butter).
Pour mixture into large mixing bowl. Make a well in the center and pour in the buttermilk. Use a fork to gently mix it in, then turn out dough onto lightly floured work surface. ONLY KNEAD DOUGH 3 times (or it will be tough) and pat it to desired thickness; cut with floured cutter and place on baking pan. Gently pat together remaining dough scraps to cut more biscuits until it is all used up.