Why do most grocery store cakes have to be refrigerated? What is different about their cakes than the standard cakes with buttercream icing I normally make - that I do not refrigerate? Sorry, this seems like a stupid question!
Could be the fillings: Around here fresh fruit with custard is a pretty standard grocery store filling, and that must be refrigerated. Also, a lot of people like whipped cream icing instead of "buttercream," so that must be refrigerated until just before serving as well. It all depends. Also, from a legal standpoint, many businesses will tell you that a cake has to be refrigerated simply to cover their a$$es legally speaking, lest there be even the slightest risk of spoilage/ food poisoning... this way if you don't refrigerate and it and someone gets sick they can say "well we told you so."