(Easy) Turtle Bars

½ cup butter
⅓ cup milk
15 oz. yellow cake mix
½ cup chopped walnuts or pecans (optional)
6 oz. caramel sauce
1 cup+ milk or semi-sweet chocolate chips (milk chocolate will be sweeter and richer)

Heat oven to 350 degrees. Mix butter, milk, and cake mix until smooth. Stir in nuts if desired. Spread 2/3 of the mixture evenly over the bottom of an 8” square baking pan and press to form a crust. Bake for 10 minutes. Drizzle caramel sauce evenly over the cooked crust. Sprinkle it with chocolate chips. Pat together and form the remaining dough mixture on the top in pieces. Bake at 350 degrees for 18-20 minutes more. Cool somewhat to let set before serving.