Once cakes are cool, take them out of the pans, and place one layer onto a cake plate. Using an offset spatula, spread 3/4 cup of frosting on the cake. Crumble cookie dough, and mini chocolate chips in the middle of the cake.
Add the second layer and repeat.
Turn the third layer upside down (so the bottom is face up) and gently place it on top of the first layer.
Use the remaining frosting to frost the rest of the cake. Start with a generous amount on the top and work your way to the sides.
Place an upside down cake pan in the middle of a baking sheet. Place the cake on top of the cake pan.
Cover the sides of the cake in sprinkles and mini chocolate chips.
Add cookie dough balls to the top of the cake.