In this tutorial, we learn how to make an adorable Barbie princess birthday cake. First, get 3 (8") round cakes and trim the dome off 2 cakes. Now, cut a small circle in the center of each cake, big enough to fit a Barbie body through. Now, spread icing along the inside of each of the cakes, using a big dollop on each cake. Place the cakes on top of each other then apply a thin layer of frosting to the entire cake. Place the cake in the freezer, then place a final coat of frosting onto the cake. You can now decorate the cake with different candies, and to finish, place the Barbie in the middle!