Preheat oven to 450.
In a 10-inch cast iron skillet, add a tablespoon of shortening and preheat.
Sift together dry ingredients; add buttermilk, egg, and drippings, mixing just until dry ingredients are moistened.
Pour into the greased, hot skillet. Bake in preheated hot oven at 450 for 20-25 minutes.
Serve warm with butter.