Caramel Nut Bars

1 cup quick cooking oats
1 cup brown sugar
1 cup flour
¾ cup butter, melted
½ tsp baking soda
¼ tsp salt
14 oz. (50) caramels
1/3 cup milk
1 cup chocolate chips (semi-sweet or milk chocolate)
1 cup nuts

Combine 1st 6 ingredients and sprinkle 1 cup into a greased 13×9 inch pan. Bake at 350°F for 10 minutes. Cook and stir caramels and milk until melted together. Pour over crust. Top with chocolate chips and nuts. Sprinkle with remaining oat mixture. Bake at 350°F for 10 minutes more. Cool on a wire rack. Refrigerate to set the caramel.