Freezing cake before decorating can be a useful make-ahead strategy, but it is not a one-rule-fits-all technique.
Check the recipe first
Different cakes handle freezing differently. Texture, moisture, fillings, and shape all matter. If you are working from a specific recipe, use its storage guidance rather than assuming the cake will behave like a standard layer cake.
Wrap to protect from air and freezer odors
When a recipe supports freezing, careful wrapping matters. Air exposure can affect texture, and uncovered cake can pick up odors from the freezer.
Thaw before final decorating when appropriate
Condensation can affect frosting and decorations. Give the cake enough time to thaw according to the recipe or method you are following before adding details that are sensitive to moisture.
Use make-ahead baking to simplify family night
For a Christmas activity, separating baking from decorating can make the schedule more flexible. Families using The Tomte Cake may prefer to bake earlier and save the story, decorating, and Tomte reveal for a different time.
The important thing is to protect food quality and follow the recipe rather than freezing by habit. When the cake and method are compatible, make-ahead preparation can turn a busy holiday evening into a much easier decorating night.