Melt 1 1/2 packages of marshmallows and 1/2 cups butter in themicrowave, add the Rice Krispies. Pat two-thirds of the mixture int eh bottom of a buttered 9x13 pan.

Sprinkle half a package of marshmallows on top. Melt the unwrapped caramels, milk, and 1/4 cup butter in the microwave and spread on the marshmallows.

Pat the remaining Rice Krispie mixture on top. Put in the refrigerator and cut into squares.