Hi Anona! The cake and buttercream should freeze and thaw just fine. As long as you don't use something like a custard for a filling, which would likely separate after thawing) you should be able to get the frosted cakes into the freezer a week or two ahead of time. They'll probably need a few hours to thaw out so try to pull them out early in the day. Annabelle@KAF

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