Preheat oven to 425 degrees.
Place ½ stick butter in a cast iron skillet or baking dish. Melt in hot oven for 3 minutes.
Take skillet out of oven and swirl the butter around to coat the pan.
Add flour, buttermilk, egg and additional melted butter in a large bowl. Mix well. It's okay for batter to have a few lumps.
Pour batter into preheated buttered skillet and bake at 425 degrees for 25 to 30 minutes until golden brown.
