Preheat oven to 375 degree F.
Place butter and oil in iron skillet. Place skillet in the oven for roughly 10 - 15 minutes till butter is melted and pan is good and hot. Sprinkle pan with cornmeal after about 5 minutes ( once butter is melted ) Being careful not to burn yourself. Cornmeal is optional ( I like it as it gives it a nice crunch ).
If you don't have an iron skillet; grease an 8 inch baking pan, and bake till golden.