1 (15 oz.) Oreo cookies, save 42 for topping
1/2 c. melted butter
1/2 gallon ice cream
1 (16 oz.) can fudge topping
1 (8 oz.) Cool Whip

Crush cookies a few at a time. Melt butter in 9 x 13 a pan. Add cookie crumbs, mix well. Reserve 1/2 cup for topping. Spread ice cream evenly over crumbs crust. Top with fudge topping, then cool whip. Sprinkle the 1/2 cup crumbs on top. Freeze until ready to serve.