Fondant, fondant, fondant. For those of you who are not familiar with what fondant exactly is, it is a sugar dough that you use in decorating cakes. The most common way to use fondant is to roll it out and lay it smooth over the buttercream layer of your cake. The fondant gives the cake a smooth, nice finish.
You can get fondant in two different ways. One way is to buy it already made. My favorite type of fondant to use is Satin Ice because of its soft texture, but its firm hold. You can also make fondant with marshmallows, powdered sugar, water, and shortening. Here is a marshmallow fondant recipe that I have used in the past that has worked well for me. When decorating with fondant, I prepare to buy my fondant instead of making it as making marshmallow fondant is time consuming and also very messy. The only downside to buying your fondant as opposed to making it is that fondant can get a little pricey.
As using fondant to cover a cake is a common use for it, there are other ways