Overnight Buttermilk Biscuits

Cream together the sugar and margarine. (I use a fork.) Sift the remaining dry ingredients with the first 2 cups of flour just to get them all in and well mixed. Alternately combine some flour and buttermilk to the sugar/margarine mix. Use all the buttermilk and enough flour to form a soft and slightly moist dough. Place dough in a covered, not sealed, container in refrigerator for anywhere from 4 hours to 2 weeks. The dough will rise while it is cold. Use some or all of the dough any time.