Tip for Freezing Baked Goods
When freezing baked goods, make sure that they are thoroughly cooled. Place in a freezer bag and close almost all the way. Insert a straw into the opening and suck out all of the air and then seal. This technique removes any chance of ice crystals forming in the bag, which would change the texture and flavor of your baked product. Almost any food can be frozen this way.
Tina Wasserman, author of Entrée to Judaism