Turtle Cake
["1 box German chocolate cake mix", "12 oz. bag caramels", "12 oz. can evaporated milk", "1 stick margarine", "1 (6 oz.) bag chocolate chips", "1 c. chopped nuts (optional)"]
["Preheat oven to 350\u00b0.", "Grease 9 x 13-inch pan.", "Mix cake mix with the melted margarine and almost half of the can of milk. Spread half of the batter in greased pan.", "Bake 15 minutes."]
["chocolate cake", "caramels", "milk", "margarine", "chocolate chips", "nuts"]