Yes, Earth Balance does melt and I used 1c of it as I had no shortening and the whole thing was a gooey mess. I even refrigerated the frosting for about an hour before attempting to ice my fully-cooled cake. Basically, it ended up more like a pour on glaze, and barely stuck to the cake. It was thin and sparse with large pools of the frosting at the bottom on the plate. This recipe was a total loser for me -- glad I tested it a couple of weeks before my little girl's birthday party.