Southern Buttermilk Biscuits
Sift the flour, baking powder, baking soda and salt together into a mixing bowl. Cut in the shortening with a pastry blender or fork. Add the buttermilk and mix with your hand, lightly but thoroughly. Add a little more flour if the dough is too sticky. Knead for 1 minute. Wrap the dough in wax paper or aluminum foil and refrigerate until well chilled, at least 20 minutes.
Preheat the oven to 450 degrees.
Roll the dough out 1/2 inch thick on a lightly floured surface - always roll from the center out for tender, crisp biscuits. Cut the dough into the desired size biscuits.
Place the biscuits on a dark baking sheet and bake until golden brown.