Prepare the brownie mix using the ingredients and instructions on the box. Pour the brownie batter into the prepared pizza pan. Use a rubber or icing spatula to spread the batter evenly across the pan.

Next, place in the preheated oven and bake for 20-23 minutes. Once the edges are set and crisp, remove the brownie pizza from the oven and allow it to cool completely on a cooling rack.

While the pizza bakes, crush the Oreos and Heath bars in two separate resealable bags.

Next, pound the bags with a rolling pin or similar heavy item until crushed. Place them in individual bowls and set them aside.

Once completely cooled, use an icing spatula to spread chocolate icing over the brownie crust. Sprinkle the crushed Oreos over the icing. Next, use orange cookie icing to create a spider web design on the chocolate icing.

Use a piping bag to fill with the orange frosting to make it easier to drizzle across this Halloween cookie cake.

Finish by loading this pizza with toppings! Use the sprinkles as a border. Evenly distribute the crushed Heath bar, candy corn, edible eyes, and M&M's.

Cut into equal pieces and enjoy!