I freeze with royal all the time.. wrap them up good and tight, let them thaw in the package they are in.. and you should be fine.
Buttercream???... not sure... I would think you could because I know of people here who have frozen a decorated cake before.. I just don't know how you would wrap and seal well without messing up the buttercream...
Thanks for asking, I've always wanted to know.
put them in a single layer on a cookie sheet, put parchement paper over top of the cookies, then another layer of cookies if necessary and repeat if necessary. Then just wrap the whole cookie sheet up with several layers of plastic wrap and then several layers of heavy duty aluminum foil.......they'll be perfectlly fine. As far as how long to thaw? Several hours, your best bet is to just take them out the day before you need to handle them and stick it on the counter and leave it there for 24 hrs. wrapped up still. After that, you should be fine.
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