Preheat oven to 425°.
Combine first 5 ingredients in a medium bowl. Combine 1/2 cup milk and 1 egg in a small bowl, stirring well. Add milk mixture to dry ingredients, stirring just until moist. Pour batter into an 8-inch square pan coated with cooking spray. Bake at 425° for 13 minutes or until golden. Cool in pan.
Reduce oven temperature to 350°.
Crumble corn bread into small pieces in a large bowl.
Melt butter over medium heat in a medium nonstick skillet. Add onion and celery, and sauté 4 minutes or until tender. Stir in sage, thyme, and pepper. Add celery mixture, pecans, and cranberries to crumbled corn bread, and stir.
Combine chicken broth, 1/4 cup milk, egg, and egg white. Add chicken broth mixture to corn bread mixture, stirring gently to combine. Spoon mixture into an 8-inch square pan coated with cooking spray. Bake at 350° for 30 minutes or until set and lightly browned.