I made this cake to replicate the grooms own game system (see pic above controller). Near the end of the night, someone stole the controller!
3 box cake mixes made according to the box instructions w/eggs, water and oil. Use two mixes for the xbox and one for the controller. 4-5 cups buttercreme icing (made or purchased). 1.5 pounds pkg of white fondant (made or purchased).
Bake and stack two 1/4 sheet cakes with icing between layers and stack two 6" round cakes with icing between layers. Sculpt away excess cake with a knife to shape the cakes to resemble controller and the xbox game system shapes. Cover with a layer of buttercreme icing. Roll and apply white fondant to cover the controller, and the back, top & front of cake with white.
Cut the white detailed pieces for the front of the xbox & set aside, covering them with plastic wrap to prevent it from drying out. Make 3 little balls and apply to the controller w/ dab of water. Color remaining fondant a grey color for the sides of xbox, & controller knobs and controller. Apply sides to the xbox & the piece on the controller. Shape & apply the grey knobs to the controller w/ dab of water. Add M&Ms on controller w/dab of icing.
For an xbox with a design (like this one) color it first before applying the details. Make a stencil from parchment and cover the xbox with it. Use a little clear piping gel to adhere the parchment to the fondant where needed; just enough to use color spray. Peel off parchment stencil. Allow a few minutes for color to dray. Use the reverse side of stencil to apply another color.
Color a little of the grey leftover fondant a black color for the piece on front of the xbox. Adhere the white details to the front of the xbox with a little water & use green piping gel to accent the power button and on the conroller. Finishing details: use a toothpick to the make holes on top of the xbox in the white areas.