First start of with baking your cake, I started with an 8 x 8 pan of red velvet batter (that's all the batter I had left. lol). Then as always, let it cool completely before starting to build.
After completely cooling start by cutting your cake into a pizza shape (triangle + rectange). I cut the crust separate from the pizza so I can build the crust a little higher.
After cutting the cake, start using your frosting of your choice to ice your cake all around and put it in the refrigerator to set for about 30 minutes.
When all rolled out, start with the brown fondant to create the crust. I cut a straight line to create the crust edge, then place over and smooth the edges to the cake. Trim excess fondant and remove. Repeat for "sauce," and "cheese."
After that put the "sauce," the red fondant, to create the look of pizza sauce under the cheese. Smooth the fondant to the cake then like before trim the edges.