Sweet Tamales With Yams and Pecans

Name: Sweet Tamales With Yams and Pecans
Ingredients: 1 large garnet yam, peeled and cubed (about 1 1/4 pound-or jewel yam); 1⁄4 cup brown sugar; 6 tablespoons softened butter, divided; 1 1⁄2-2 cups masa harina flour (corn flour); 2 teaspoons cinnamon; 2 teaspoons baking powder; 1⁄2 teaspoon salt; 1 1⁄2 cups chicken broth or 1 1⁄2 cups reduced-sodium chicken broth; 1⁄2 cup chopped toasted pecans; 15 -20 corn husks, soaked for 1 hour in warm water; Chipotle Cream; 1⁄2 cup sour cream; 1 tablespoon minced chipotle chile in adobo (canned)