Make the Oreo crust
: Line an 8x8 inch baking dish
with foil and butter the sides and bottom. Add Oreos to a food processor and pulse until finely crushed. Using a large mixing bowl, melt butter in a microwave. Add crushed Oreos and mix well. Distribute over the baking dish, pressing it flat over the bottom of the baking dish. Place in the freezer while you work on the next step.