Sugar Cookie Icing: 1 cup powdered sugar, 1 T. milk, 1 T. light corn syrup, 1 drop lemon juice. (I love this one becaue you don't have to buy that expensive egg white powder) Dries and is stackable. Add extracts for different flavors.
Homemade Sugar Cookie Icing. This is by far the easiest, most diverse and definitely yummiest homemade sugar cookie icing recipe that I have found. http://www.hillbillyhousewife.com/homemade-sugar-cookie-icing.htm