Swiss meringue buttercream (SMB) is a light, silky and buttery alternative to traditional buttercream. It is much less sweet, and therefore allows for the true flavors in the cupcake to shine. It is easy to pipe and holds its shape very well. There are a lot of flavor variations that make this a very versatile frosting. Although it seems like this takes more preparation than other types of frosting, the end results are very rewarding.