Nov 11, 2018 · 4. Pipe the icing onto the cookie and use a knife to spread the icing. If you like to add a bit of color, just follow the first steps and use a different color of icing. The glaze does start to dry immediately. Therefore, add sprinkles right away. Let the cookies sit until the icing/glaze has time to harden. You can then stack the cookies.
Nov 29, 2007 · I'm in the midst of planning all my Christmas cookie baking and I'm not sure if I can use colored sugar, sprinkles, and other decorations that I have left over from last year. I can't find any expiration dates but I'd feel bad if I got people sick with old sprinkles.