Combine 1/3 cup of evaporated milk with caramels and melt over low heat. Set aside.

In large mixing bowl, combine cake mix, butter, and evaporated milk. Mix with your hands until dough is together. Pat half of dough into greased and floured pan. Reserve rest for top. Bake at 350 for 7 minutes. Sprinkle chocolate chips over crust. Pour caramel over chips. Drop rest of batter over caramel mixture. Return to oven for 20 minutes at 350.