For the cake, I used 2 boxes of Betty Crocker's Gluten Free Yellow Cake Mix and baked in 2 square glass cake pans. The recipe below is for a very sweet, rich buttercream frosting using coconut milk. This is from Gluten-free goddess. I'm writing it as it is written, but I useed regular butter. I used apricot jam as a filling between the two layers. There was plenty of frosting for the top and sides. You can decorate with flaked coconut.