Yam Fried Chicken

Name: Yam Fried Chicken
Ingredients: 3 pounds sweet potatoes, peeled and diced into 1-inch cubes; 1 stick butter or margarine; 1 pound sugar; Florence's Fried Chicken, recipe follows; 2 cups all-purpose flour; 2 teaspoons salt; 2 teaspoons butcher's grade pepper; 1 tablespoon baking powder; 1 tablespoon cornstarch; 1 whole chicken, cut into 10 pieces; 1 tablespoon salt; 1 tablespoon ground pepper; 4 cups shortening