Sometimes the best cupcake designs are cute and uncomplicated. Take these rubber ducky cupcakes for example. All that you need to do is bake the cupcakes (you can choose the flavor), adhere one half of a marshmallow and a doughnut hole to the top with vanilla frosting. Then, dip the top of the cupcake in yellow frosting and voila! Add on the details, like the beak, eyes, and you will end up with a cupcake that is almost too cute to eat.