Minnie Mouse Cake Posted on January 7, 2013 by Robyn Bent This Minnie Mouse Cake design was created for a 16th birthday. A fondant cake with a custom “16″ sugar topper. 2 tiered cake – 8 inch round bottom cake with a 6 inch round top cake. All the accents are made of fondant and are edible. Related posts:Heart shaped birthday cakePolka Dots CakeCakes, cakes, cakes!!Birthday Cake Ideas - Adventure Time!