I am doing a restaurant building cake for a customer. It will be covered in buttercream (butter, shortening, vanilla, icing sugar)...there is no filling...it is a slab cake...It will have some fondant accents on it also.
The customer wants to leave it out on display when the restaurant opens at 5pm, til about 11pm, as people walk in the door...The restaurant is closing, so, it's kind of a good luck cake.
anyway, can the customer leave the cake out all that time? Even with the fondant on it?..I live in Ontario, Canada, so, I don't have to worry about heat/sun this time of year.
Any help is appreciated.