Preheat oven to 350 and line a 9x9 pan with nonstick foil.

Food process the cookies to crumbs.

Mix crumbs with the sweetened condensed milk and stir in the Butterfingers.

Press into the pan and bake 20 minutes.

Remove from the oven and sprinkle on the chips.

Return to the oven for 2 minutes and then spread the chocolate across the bars.

Cool completely and cut into squares.