I am catering a shower and the husband wants yellow cake with chocolate icing however everything is being done in small bites so I can’t do a whole cake. I was thinking of doing petit fours but I don’t want to cover them in poured fondant. So I was wondering A. if I just have the cake in squares ( layer of cake, icine, layer of cake, icing) on a tray how long will they last before the air starts to dry them out. (using an oil cake) B. I have never tasted the chocolate laquer glaze but I was wondering should I used that to cover the cake? I would prefer to use ganache but I don’t know if it will set up or if it can be poured like the glaze.