5. To decorate with the icing, pipe a border around the edge of you cookie. Let this border sit for about 5 minutes. Once it has dried then fill in the cookie with icing. To make fun patterns and designs you can pipe a different color onto the cookie while it is still wet, or pipe another color on, after it has dried. Just depends what kind of look you like. All of the cookies you see here used the wet on wet technique.
6. Once the cookies are dry you may stack them without ruining your beautiful decorating. However, I would advise you to let them dry overnight.
Enjoy! Have fun!