Preheat oven to 350 degrees F. Grease two identical 9x13-inch baking pans.

Prepare chocolate cake mix according to package directions. Pour into a greased baking pan.

Prepare white cake mix according to package directions. Pour into the other greased baking pan.

Bake cakes for 35 minutes until a toothpick inserted into the center of the cake comes out clean. Allow both cakes to cool completely.

Use a stand mixer to whip up Chocolate Buttercream Frosting.

When the cake is cool, level the chocolate cake if needed then place it in the middle of the serving board.

Cover the top of the chocolate cake with a layer of chocolate buttercream frosting,

Cut the white cake roughly in half longways to form the hill. Angle the cut so that it is a gentle slope. Place the white cake on the back half of the frosting-covered chocolate cake for the hill.

From the remaining white cake, use a knife to cut a circular shape that is about 3 inches wide and another circular shape that is about 2 inches wide. These cake circles will form the volcano.

Apply a layer of chocolate buttercream where you want the volcano to be then place the 3-inch circle of cake on top of the frosting. Add chocolate frosting on top of the circle of cake then place the smaller circle on top.

Use a sharp knife to even out the cake circles to make a smooth volcano.

Apply chocolate buttercream frosting to the entire volcano, the top of the cake, down the angled "hill" and on all sides of the cake. A thick layer of frosting can be used to smooth the transition from the volcano to the hill and down the slope to the flat cake. The frosting should be irregular like dirt and terrain.

Place two to three 7-inch dinosaurs on the cake facing toward the volcano.

Create rocky terrain using the Whoppers and chocolate-covered raisins. Group the candies into several rocky outcrops around the landscape. Add a few trees around the dinosaurs.

Sprinkle crushed Oreo cookies on the top of the volcano and down the sides to represent lava or ash from the volcano.