It didn't say to use fondant. Only recommended using a fondant tool to smooth the frosting.
The cake sounds yummy and the picture is cute, but how much fondant do I need to buy? What kind? DETAILS people. Read before you post your recipes.
So where is the fondant recipe, or even a reference to it in the description? It's not even mentioned in the cake ingredients. Sloppy editing work. I gave it one star but haven't tried it-obviously!