Preheat the oven to 350°F. Butter or spray a 9x13-inch casserole dish.

Melt butter in a large skillet over medium heat. Add onion, celery, salt, black pepper, garlic powder, and minced fresh herbs. Cook for 7 to 10 minutes or until tender.

In a large bowl, combine sage stuffing mix, herbed stuffing mix, celery and onion mixture, and chicken broth. Stir to combine.

Pour into prepared 9x13-inch dish and cover with foil. Bake in a preheated oven for 35 minutes. Remove foil, and bake uncovered for another 15 minutes or until golden brown.