Place the flour in a large bowl. Using a pastry blender or 2 forks, cut in the cold butter or shortening until it is pea-size. Gradually add 1 1/2 cups cold buttermilk, stirring just until the flour is moistened. If the batter is dry, add up to 2 tablespoons remaining cold buttermilk, 1 tablespoon at a time.☞ TESTER TIP: Skip the arm workout and blitz the flour and butter together in your food processor, then slowly drizzle in the buttermilk.