If you are planning to use this frosting on a multi-layered cake or are icing something that will be sitting out for a while, it can be a good idea to add a stabilizer. Frosting that is made with whipped cream can lose its structure when it begins to get warm and it also isn't very strong to do well in between a lot of layers. So if you know your cupcakes will sit out at a party or event, add a stabilizer. If your favorite cake has a lot of layers, add stabilizer before using it on the cake. The extra step will be worth it!