preheat oven to 325°F. lightly grease a 9x13 disposable foil baking pan.

meanwhile, in a medium heavy saucepan heat and stir caramels and cream over medium-low heat until melted and smooth. stir in peanuts. sprinkle marshmallows over baked cookie crust. pour caramel mixture over marshmallows, carefully spread evenly.

bake for 8-10 minutes or until caramel is set and bubbly around edges. cool in pan on a wire rack. to serve, cut into bars.