If I want to put a cake in the freezer (uniced) for a few days, should I put the simple syrup on before I freeze it?
Yes, i would torte it, simple syrup each side(not wet it) wrap good and freeze. That is what i would do. Others may do different.
I always freeze my cakes, and have never used simple syrup. I just wrap my cakes in saran wrap and then a layer of tinfoil. I wrap them while they are still warm from the oven which makes them nice and moist.
I freeze my whole cake and torte it later. I let it thaw a bit in the refrigerator to make it easier to cut but still not room temp...makes crumb coating easier. I don't use simple syrup usually but I have used Khalua as a 'syrup' spread on chocolate cake...but again, I do it after I've torted.
I always freeze cooled cakes and the reason is, that I've had warm cakes form condensation and actually make them soggy. I just wrap tightly in several layers of saran wrap and take the wrap off before letting it come to room temp.
I've had trouble freezing cake with simple syrup already on it...the syrup seems to go gritty. I would apply the syrup after thawing.
I simple syrup if needed, torte and crumb coat before freezing quiet often. Life is good.