If you have leftover frosting, you can refrigerate it for 6-7 days or freeze up to 3 months. Don't forget to label and date your frosting

This is a crusting buttercream in which you can smooth the frosting using the Viva paper towel method. Check out Edna's tutorial on frosting a cake and smoothing using the Viva paper towel method

This buttercream is on the thicker side, you may need to thin it down with water or milk depending on the consistency you would like