To make this cake, I followed the instructions that come with the Wilton Wonder Mold cake pan. Differences: used a Pampered Chef Batter Bowl to bake the cake (makes it taller), used one size larger tip to pipe the tail, made candy seashells using Wilton candy mold. I also baked another 6" layer cake and stacked the dome-shaped cake on top of it. It gave it height that looked proportionate for the size of the doll's body. (This would work well for making a dress cake as well.) Marble cake with fudge icing between layers, buttercream icing outside. (See other picture for complementary cakes for same party.)