In one large bowl, mix together your ingredients for a boxed chocolate cake mix. Take your two square 8 inch cake pans and grease them with oil. I also like to line the bottom of the pan with a square of parchment paper to reduce the likelihood that the cake will stick.

Spread the cake batter evenly between the two cake pans and tap them on your counter to get rid of any air bubbles and to help smooth them out. Pop them into the oven for about 25 minutes or until they’re fully baked.

I highly suggest cooling your cakes overnight. Wrap them in plastic wrap once they are cooled to room temperature and then stick them in the freezer. Frozen cake is much easier to work with once you start adding frosting.

When you’re ready to decorate your cake, trim the top off the cakes so they are both level. Then stand one frozen cake on its tall edge and use a sharp small knife to cut a triangle wedge carefully out of the cake. Set the wedge aside and put it back in the freezer to use later as a ‘ramp’.

If you’re confident with making homemade frosting, it’s the best way to go. It will definitely be easier to work with once you start frosting your cake. However, for this recipe two cans of chocolate frosting will be just fine.

For the green grass frosting, you can purchase a small tube of green frosting, or use white frosting and dye it green. Put your green frosting in a piping bag with a grass tip and set it aside.

Start by adding a layer of chocolate frosting to the top of the first cake. Stack the second cake on top and then add chocolate icing to the sides and top of the second cake.

After your cake is frosted, take your triangular piece of cake that you set aside and add it to the top of your cake as a ramp. Place it on your cake and add some toothpicks to it so it won’t slide around as you frost it.

Add chocolate frosting to cover the ramp. I also added a row of KitKats to the side of my ramp and trimmed them to fit. It added more stability and made things more square.

Scrape the inside of the Oreos out and put the black cookie pieces in a thick plastic bag. Smash the cookies until the crumbs are fine. You can instead use a food processor if you have one.

Add some crushed cookie to your cake to form the ‘trail’ or path a monster truck might take across your cake.

I added brown jimmies to the bottom edge of my cake; you could use any type of dark sprinkles, M&Ms or more crushed Oreos to make a border.

Use the grass piping tip and green frosting to add ‘grass’ to your cake around the top edges and to help add definition to the truck ramp.

Gently place your monster truck toys on the cake where you’d like them. Pick your favourite vehicles to use as your cake topper. My toys have a small hole in the bottom frame that I added a long skewer to. The skewer helps stabilize the toys so they don’t fall off or slide and make a mess of the frosting.

Lastly, place your crushed car toys on the cake near the ramp, and add the toothpick race flags to your cake, if you have them.

When you’re cutting this cake, don’t forget to take out the skewers and toothpicks before you cross the finish line and serve it to your guests.

You can display your cake during the party at room temperature for all your guests to admire, then when it’s time to cut and serve, remove decorations like toys and flags, and enjoy!