1. Preheat the oven to 375 degrees. 2. Whisk together the self rising flour and sugar until combined. 3. Cut in the shortening with a pastry cutter or fork until the mixture resembles coarse sand. 4. Pour in the buttermilk and stir until dough forms. 5. Turn the dough out onto a floured surface and knead until no longer sticky. 6. Roll the dough out until it’s around ¼ inch thick, then use a biscuit cutter to cut out the biscuits. 7. Place each biscuit on an ungreased baking sheet and cook for 25 minutes, until the biscuits are golden brown. Halfway through the cook time, brush the tops of the biscuits with butter, then  continue baking.