I have a wedding cake due this weekend. As I am pressed for time, I filled, crumb coated & froze the three tiers.Can I remove the cakes from the freezer & add the final buttercream coat while the cakes are still frozen, or do I have to wait for them to thaw before adding the final coat?

Did you allow them any time to settle before you froze them? If not, you might want to let them thaw and settle before putting on your final coat of icing. You don't want any sagging or drooping, if you can help it.

I was pressed for time once and iced my cakes while they were still frozen. When they thawed out I went to decorate them and had huge cracks in the icing.I'm assuming it was because the cake expanded as it thawed. I now wait until they are thawed and haven't had a problem. HTH

I always ice my cakes, especially wedding cakes while they are frozen. Just make sure you use a crusting buttercream and you should be fine =)

I use Italian Buttercream and I found that when I applied it to a frozen cake the butter started firming up really quickly. It made it harder to work with and smooth, so always thaw my cakes before the final coat.