​Piping the icing into the well of the cookies is so much easier than trying to scoop it with a spoon and trying to move that dollop of icing from the spoon into the cookie. Trust me. If you don't have a piping bag, I highly recommend you purchase reusable piping bags and have them handy anytime you're using icing. But, in a pinch, you can cut off the corner of a ziptop plastic bag and use that as a piping bag.