Cookies with royal icing can be frozen and quite well. You’ll just have to make sure you put the cookies in individual freezer bags and then stack them in a container so they’re better protected. When it comes to royal icing, the recipe only requires a few ingredients – egg whites, confectioners sugar, and a bit of lemon juice.
Once your iced cookies have completely dried, place them in an airtight container, like a plastic freezer bag or Tupperware, with sheets of waxed paper in between any layers, and pop them in your freezer. Within 30 minutes to an hour, the cookies will be completely frozen. Always mark the bag with the date the cookies were put in the freezer!
You should defrost your royal icing by taking it out of the freezer the night before you need to use it. Take it out of the freezer and place it in the refrigerator. There’s no need to remove it from the bag in which it was frozen; make sure you keep it covered when it’s in the fridge.
Follow this tip: The best cookie doughs to freeze are drop cookies like chocolate chip or oatmeal, slice-and-bake cookies like shortbread, and cut-out cookies like sugar and gingerbread. 2. Not using the right method to freeze a particular dough.