2 cups of cold self-rising flour (such as White Lily brand) 1/4 cup very cold butter, shortening or lard 3/4 cup cold buttermilk Preheat oven to 500 degrees. Coat a 10-inch cast iron skillet with additional shortening or oil and place into the oven for five minutes. Put the flour into a bowl and cut the very cold butter into cubes and toss in the flour.