Melt butter in a large bowl and toss in mushrooms, celery, onion, stuffing cubes, and all seasonings.
Whisk egg and broth together and pour over stuffing mix.
Stir until well combined.
Spoon into slow cooker prepared with nonstick spray.
Cover and cook on low 3-4 hours.
Serve and enjoy!
Notes
Add Nuts: For extra crunch and nutty flavors, toss in some chopped nuts like almonds or pecans to this thanksgiving stuffing recipe.
Fresh Herbs: Experiment with fresh herbs like rosemary or thyme for added depth of flavor.
Add Meat: To make this stuffing even heartier, consider adding cooked sausage, bacon, or pancetta for a savory twist.
Make Your Bread Cubes: Make your own bread cubes by cutting loaves of sourdough bread or french bread or any other kind of bread into small cubes and season well.
Other Mushroom Variations: You can use shiitake mushrooms, wild mushrooms, porcini mushrooms, cremini mushrooms, or oyster mushrooms.