Caramel Chocolate Squares

50 light caramels (14 oz package of caramel squares)
2/3 cup evaporated milk
1 Package German Chocolate Cake Mix
1/4 cup butter or margarine melted
1 cup chopped nuts
1 cup Chocolate Chips

Set oven at 350. Generously grease and lightly flour 13x9 baking pan. Combine caramels and 1/3 cup evaporated milk. Cook using double boiler or melt in microwave - do 30 second increments until all is melted. In large bowl combine dry cake mix, butter, remaining 1/3 cup evaporated milk, and nuts. Stir until dough holds together. Press half of dough into prepared pan. Reserve remaining dough for topping. Bake dough for 6 minutes. Sprinkle chocolate chips over baked crust. Pour caramel mixture over chocolate chips. Spread remaining dough on top. Use hands to form large pieces of dough to lay on top of caramel mixtures, since dough is sticky and won't spread with a spoon. Bake for 15-20 minutes. Cool, then cut into bars. If desired, refrigerate.