In a large mixing bowl, combine four, baking powder, baking soda, and salt, Using your fingertips, rub the utter and shortening into dry until it looks like crumbs. Pour in chilled buttermilk. Stir just until it comes together. Turn dough onto floured surface, fold cough over itself 5-6 times. Press into a 1 inch thick round. Cut with a 2 inch cutter, push straight down. Reform excess cough and repeat. Bake for 15-20 minutes in a preheated 450 degree oven.
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