I make a regular cream cheese frosting for my carrot cake with cream cheese, butter and icing sugar, and have been wondering how long it can last at room temperature. Jeannie had mentioned she uses that frosting as a filling for her fondant covered cakes. So does that mean it wont spoil for a couple of days at room temperature? Would that also hold true if I substituted mascarpone for the cream cheese?
I too have been thinking of using it as a filling in my fondant cakes….i prefer it to the white chocolate cream cheese frosting in the cake bible.