Make one cake mix following the 9x13 pan directions on the box and follow the baking time on the box. Let cool completely.

Mix up another cake mix and separate into two greased pyrex glass bowls. Spread about 2/3 mix in the large bowl and the remaining in the small bowl. Place both in the oven at the same time (temperature on the box, mine was 350) and bake the small bowl for 40 minutes and the large for 45 minutes. Check doneness with a toothpick in the center. Remove from oven and cool completely.

Using a piece of sturdy cardboard (old box) cut to around 12" x 16" and cover with foil. Secure foil on the backside with masking tape.

To assemble the cake, I cut my 9x 13 cake in half so it was more manageable and easier to remove from the pan - and as shown it broke but was easy to piece back together. Place on foil.

Cut the bubble tops off of the round cakes to make them flat. Place large circle cake on the rectangle cake and the small cake directly on the foil. Add additional pieces of cake to create a ramp or mounds as you desire. I was worried my cake was beginning to look like the female bust line as I began to assemble it!

Spread frosting on the cake. I lifted up the larger circle cake to spread frosting under it to help hold it to the cake below it. When completely frosted, begin your carving.

Using a cake knife or something similar, scoop cake out of the large mound and place aside. Set vehicles onto your cake and sprinkle un-frosted crumbled cake on the cake and in the dump truck and scoop.

rumble cake in front of the bulldozer. Don't worry if you carve out too much, just add it back in!