By Betty Crocker do you mean the premade icing in the can?
If so, that icing is way too soft to use for decorating. If you want to ice and decorate you'll have to make buttercream icing. If you are talking about the type of icing the bakeries use are you aware that is made with shortening, powdered sugar, water, meringue powder and flavorings? The idea of eating shortening is not too appetizing, but it works great for smoothing and decorating and if you use the right ingredients it doesn't taste bad at all.
I've taken many cake decorating classes and the shortening-based buttercream icing is the easiest to work with.