Combine, and mix well, cake mix, nuts, 1/3 cup milk and butter. Press half of this mixture into the bottom of a greased 13x9" Pyrex dish, Bake at 350F for 8 minutes. Melt caramel candies in top of a double boiler with 1/2 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 350F. Cool before slicing.