Decorated Sugar Cookies

I intend to use corn syrup icing http://allrecipes.com/Recipe/Sugar-Cooki ...

Can I stack when I freeze them?
I need to make sugar cookies 90 for my sister's wedding favors, and try to find ways to save time still serving as fresh as possible. I hear homemade baked goods are best eaten within a few days. It'll take me a few days only to decorate!

No, they are fine to freeze, my parents do it every year. Just keep the parchment or waxed paper between them so they do not "conjoin". Also, when you thaw them, make sure they can breathe or they get soggy.

mmm sounds good. But I do not know.

No. In fact, you should keep in a cool place - so it will not melt. Make sure you do not keep them in the freezer for too long with a temperature very pass there, they could become popsicles! Keep them in the refrigerator reserves is the freshness.