Unicorns are all the rage among kids, and a unicorn cake is a whimsical and enchanting choice for a birthday celebration. The cake can be baked in the shape of a unicorn's head or a full-body unicorn. The flavors can be as magical as the theme, with options like cotton candy, rainbow, or vanilla. The cake is frosted with pastel-colored buttercream frosting and decorated with edible gold stars, rainbow sprinkles, and a fondant unicorn horn. This cake will transport the birthday child and their guests to a magical world of unicorns and rainbows.