This isn’t a recipe so much as a tutorial. I started by making two round cakes (from a package). After they had baked I wrapped the pan with plastic wrap and filled it with icecream.
After the ice-cream froze in the shape of the pan I layered the cake, then ice-cream, then cake. Next, I frosted the whole thing with softened cool-whip. Next I took hot-fudge topping and just poured it around the very edge of the cake and let it drip down the sides. And very last I just decorated it with oreos, and anything else you want.