【How-to】Does frosting with cool whip need to be refrigerated

Whether homemade, store-bought, dairy, non-dairy, opened, or unopened, whipped cream can only sit out for 2 hours. If left out longer, whipped cream of kinds moves into the Danger Zone. This is the term used by the U. S. Department of Agriculture for the temperature zone that sits between 40˚F and 140˚F.