Frost each cupcake with a small amount of icing. (This makes it easier to cover the top with the fur.)
Using a pastry bag fitted with a multiopening tip, pipe on the fur to cover the cupcakes.
Cut each marshmallow in half to create two ears. Pipe a pink stripe down the center of each. Press the ears into the cupcakes.
Place two white chocolate chips on each cupcake for eyes. Place a small dot of black icing in the center of each.
Place a pink jelly bean on each cupcake for the nose. Pipe black whiskers on each bunny.