Cream cheese frostings will be much softer than buttercream frostings. You can stiffen it by adding additional confectioners' sugar or even by.
Stiff buttercream can create swags of frosting on a cake. For a stiffer buttercream you can use a combination of butter and shortening, milk, confectioners'.
How to Thicken Frosting. Frosting can be harder to prepare than it looks. If you're having a frosting emergency because the batch you've whipped up is way too.