Question: can you freeze a cake covered in swiss meringue buttercream?
Answer: It is sturdy, with plenty of fat, and it will do better in the freezer than a more delicate meringue-based icing. Buttercream also freezes well. The best way to freeze a cake is to bake the layers as usual, let them cool completely, and then ice them. ... Let it freeze until solid — at least four hours.