Yes, you could make it tonight and it would be fine in the freezer. One thing I learned especially in the summer, is once you put the FBCT on the cake, don't cover the cake with plastic wrap or anything. I have had condensation form and then the image smeared. You should wait until the tranfer thaws and crusts before covering the cake.
A suggestion (just to be on the safe side)...leave your fbct in the freezer for about 1 1/2 hours...depending on size. Then wrap it in glad wrap. I use press n seal.
This is just to insure that it won't get freezer burnt or absorb any smells/ tastes etc.
Good luck with your first fbct!!!!
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