2. Make Dough
Place all flour, baking powder, salt, butter, and buttermilk in a food processor and pulse just until they combine to form a dough. Place the dough on a generously floured surface. Roll the dough into a 10 by 8 inch rectangle. Fold the rectangle into thirds then roll out again into a 10 by 8 inch rectangle. Fold into thirds, wrap in plastic wrap and refrigerate for 30 minutes.