https://cakedecorist.com/how-to-harden-marshmallow-fondant/ One of the most popular types of fondant to use is marshmallow, however, some people have issues with it being too soft. At a slightly hardened consistency, it can be much easier to work with when making designs. Did you enjoy this article on how to harden marshmallow fondant? If so, please share your thoughts in the comments down below. "This presentation contains images that were used under a Creative Commons License."