Crush 3/4 of the cookies package. Put into a large bowl. (Leave 5 cookies to break by hand.)
Melt 6 tablespoons of butter. Add melted butter to the cookies crumbs and stir.
Put into a prepared 7"x11" baking dish (with aluminum foil or parchment paper).
Pat the crumb mixture equally around the bottom of the dish. Bake in oven for 6 minutes.
Lay the cut up pieces of the candy bar upon the partly baked crust. Pour the can of sweetened condensed milk all over the candy bar pieces. Follow by adding the white and chocolate chips across the top. Finally, add the last five cookies by breaking into pieces onto the top of bars.
Bake for 28 minutes. Cool completely. Lift the bars out of the baking dish by grabbing the edges of the paper or foil. Divide and cut into pieces.