Peanut Butter Chocolate Kiss Cookies

creamy peanut butter 1/2 cup shortening 1/3 cup granulated sugar 1/3 cup packed light brown sugar 1 egg 3 tbsp milk 1 tsp vanilla extract 1 1/2 cups all purpose flour 1/2 tsp baking soda 1/2 tsp salt Granulated sugar for rolling Chocolate chips (any type)