Preheat oven to 375 degrees. Slice cold butter into pieces, combine with sugar, baking powder, and flour. Mix (using your hands) until mixture is crumbly and well mixed. Add 1 cup light cream or half and half, knead well.
On a lightly floured surface, roll out dough to about 1 inch thickness. Using a biscuit cutter, cut out biscuits. Place biscuits on an ungreased cookie sheet. Brush a little bit of leftover cream on top of each biscuit. Bake for approximately 8 minutes, or until very light golden on top. Watch carefully, do not overbake.