Here's what to do:

1. Coat the cast iron cookware liberally with vegetable oil or shortening. Be sure to do the inside and outside. If there's a lid, do it, too.
2. Then, place your cookware in a 300-degree oven for one hour.
3. Remove the cookware from the oven and wipe off any liquified shortening. Your pan is now seasoned!

How to Season a Cast-Iron Skillet

1. Preheat the oven to 450 degrees Fahrenheit.
2. Wash the skillet with warm soapy water. ...
3. Apply a thin layer of cooking oil to the surface of your cookware (inside and out, including the handles).
4. Bake your cookware upside down at 450 degrees Fahrenheit in the oven for one hour.
5. Allow the pan to cool down completely, and repeat three more times.