Many think that cornbread is best baked in a cast-iron skillet.
Cornbread pans, picking up on that, are made of cast iron. They are typically a tray with around seven moulds in it. These moulds are long, and shaped like an ear of corn with kernels indents in them.
You put the corn bread dough in here to bake. The corn bread comes out flat on the top, corn-shaped on the bottom.
You invert them out of the pan to serve them.