Crock Pot Stuffing

Name: Crock Pot Stuffing
Prep time: 20 min
Cook time: 3 h 30 min
Total time: 3 h 50 min
Cuisine: American
Ingredients: 1 cup butter; ½ teaspoon black pepper; ½ teaspoon salt (or to taste); 2 teaspoons poultry seasoning (store bought or homemade); 2 medium onions (diced); 2 cups sliced celery; 6 cups dry white bread cubes (*see note); 6 cups dry brown bread cubes (*see note); ¼ cup chopped fresh parsley; 1 tablespoon fresh herbs (or to taste, thyme, sage, rosemary ,optional ); 3 cups chicken broth (plus an additional 1 cup if needed); 2 eggs