Learn to decorate cookies in this series from Thayer Treats!  Each class will build on skills learned in the one previous. Sign up for one class or the whole series.  Open to adults and teens entering 7-12 grade. Friday, June 30: Royal Icing 101 Learn about coloring and creating three consistencies of icings, then use them to flood cookies. Friday, July 14: Icing Cookies 101 Practice four different methods of icing cookies; piped flood, piped hybrids, wet on wet technique,…