It is a 8 inch chocolate cake with white decorator's icing. I didn't have 4in cake pans so I baked a 9x13 and cut out 4 inch circles for the ears. I stuck crushed oreos on the side to make the ears black. The bow is a chocolate chip cookie with icing and pink sugar sprinkled. (Although I don't recommend using a cookie -- it is difficult to get such a big cookie firm enough without it breaking into bits.) The face is just frosting.
Happy Birthday Tayla!