Learn how to use a zip lock baggie as a pastry bag to frost cupcakes and learn my secret of how to easily fill the bag with frosting. Here is an updated version of this tutorial: • How to Frost Cupcakes with a Zip Lock Bag For the buttercream recipe visit my blog: http://www.tipsfromatypicalmomblog.co... For the royal icing recipe for cookies: http://www.tipsfromatypicalmomblog.co...