I made a batch of chocolate stout beer cupcakes with peanut butter buttercream a few weeks ago and had a request from a friend that I make these for her baby shower. Of course she asked that I decorate them accordingly (she's having a boy!), so blue candies and blue liners are in order. The light brown butter cream would look great with the blue candies and liners and is enough blue I think... but I am curious... Can you dye peanut butter buttercream? Would it turn out horrible?