Penguin cupcakes 1 This entry was posted in Cupcakes and tagged birthday cupcakes decorated penguins on September 18, 2013 It was my boyfriend’s son’s 7th birthday, and he loooooves penguins! The cupcakes are chocolate and white cake swirl, and the frosting is basic buttercream. Most of the penguins turned out adorably, but oh no! A mutant! AAAAUGH!