Confetti swirl cake filled, frosted, and decorated with CC frosting. The letters are cake as well. This was made for my son who had just learned how to read! Just a side note...I learned how to make 3D cakes from my mother, who taught me to freeze the filled cake and then carve it using an electric carving knife. I have found that method doesn't work as well when doing more detailed designs. Knowing what I know now, I use the electric carving knife only half of the time, and I DO NOT freeze my cakes anymore. Mostly because it takes too much time....and I just don't have the freezer space. :)