In a mixer with a paddle, blend water, oil and cake mix on low speed for 2 minutes. Scrape bowl and paddle, then mix for 3 minutes on medium speed. Divide between three ½ sheet trays.
Bake at 365 F for 25 minutes or until baked.
Ganache
Heat to 115°F to create a glaze.
Assembly
Build the cake, alternating between layers of cake and layers of ganache.
Before the ganache sets completely, run a cake through the top to create a design.