Combine, and mix well, cake mix, nuts, one third cup milk and butter. Press half of this mixture into the bottom of a greased 13x9 inch Pyrex dish, Bake at 180ºC for 8 minutes. Melt caramel candies in top of a double boiler with half cup of milk. when caramel mixutre is well mixed, pour over bakied mixute. Cover with chocolate chips, and pour the rest of dough on top of chips. Bake for 18 minutes at 180ºC . Cool before slicing.