Preheat oven to 475 degrees F.
Slice butter and put on a plate in the freezer.
Sift the dry ingredients together into a bowl. Cut in the butter with a pastry cutter or a fork until it looks like coarse sand. Add the buttermilk and continue to cut the dough together. Turn out onto a floured surface and gently bring together. Gently press the dough into a rectangle until it is between 1/2 and 3/4-inch thick.
Use a round cutter that has been floured to cut the biscuits. Place in the freezer for at least 20 minutes. Remove biscuits from freezer and place on parchment paper on a baking sheet so they are touching each other. Bake for 20 minutes. Remove from the oven and serve with spiced butter.
Mix dry ingredients together. Blend together with the butter using the back of a spoon. Wrap tightly and refrigerate overnight or a few hours.