I start with boxed cake mix. You can of course make from scratch, I however save my time and energy for decorating and not making cake from scratch. When I make a yellow cake, I like the butter cake mix, it just to me has a really good flavor.
Now it is time to start the decorating. First thing you need to do is make fondant (you can buy fondant if you chose Michaels is a good place to get it). This is the recipe I use. To cover this cake I used 24oz of marshmallows (so 1 1/2 times the recipe).
Melt the marshmallows