I have made a waffle but so sorry it is a fake one!
A Waffle is a batter-base or dough-base cake cooked in a waffle iron patterned to give a characteristic size, shape and surface impression. (from Wikipedia explanation). So in order to make a nice and pretty Clay Waffle, a mold is needed.
I have make this clay waffle using a simple mold to get the characteristic shape and surface impression. To make the clay waffle to look real, I painted the surface.