Melt caramels and 1/2 c. evaporated milk slowly in microwave.
Microwave for 30 seconds then stir.
Continue doing this until caramels are melted.
Mix cake mix, 1/3 c. evaporated milk, and butter together in mixing bowl.
Put 1/2 of cake mixture into 9 x 13 glass dish. (press to cover out the bottom of the pan) Bake for 6-10 minutes at 350 degrees. Sprinkle chocolate chips on hot cake.
Pour caramel over chocolate chips.
Drop chunks of remaining cake mixture on caramel.
Bake for 10-15 minutes at 350 degrees. Regular toothpick test will not work on these because of the caramel.