Enameled cast iron cookware are cooking utensils made using cast iron, which is then coated in enamel on the inside or outside or both. This is really a two part question- the enamel itself, and the cast iron skillet. You might have guessed it from its name already, but enameled cast iron skillets are simply cast iron pans that has been coated with a vitreous enamel glaze. This can be done for a variety of reasons, though typically these reasons are either aesthetic in nature or more functional by design. How Is Enameled Cast Iron Skillet Made? The enamel is made of powdered glass, clay, and water.