First, make sure the cream cheese and butter are both softened to room temperature. Whether making frosting or filling, softening helps create a smooth and creamy finished product.  Whip the frosting until it starts to look fluffy and thick, but don’t over mix. Over-mixing can lead to runny icing that will not stick to your rolls. If this happens to you, add more powdered sugar to the mixture, a little at a time, until the frosting thickens back up.Carrot Cake Cookies and Banana Bread are two other delicious desserts with sweet cream cheese filling.