It would appear I just discovered something....I just frosted some cakes which were still cold having come out of the freezer, and the frosting (Indydebi's) won't crust. Is that because of the cakes being cold?
Yes, your cake is letting out moisture into the buttercream so it is going to take longer for the buttercream to crust. Most likely your buttercream is also cold now so it will have to come back to room temp before it can dry and crust.
Thank you. Lesson learned. I ended up just using a comb on it since I didn't have the time to wait. Will adding too much color to an icing also affect it's crusting?
I use her recipe as well and I have posted many times that if you ice a frozen or cold cake using this icing it WILL NOT crust. It's also not a good idea to put it in the refrigerator to crust after crumbcoating.
This is one reason I NEVER refrigerate my cakes.
It will eventually dry and crust but it will take awhile. I will never make that mistake again. I did it once and it won't happen to me again