These Slow Cooker Roast Beef Po Boys are one of our absolute favorites. Beef slow cooks all day in a flavorful sauce of brown gravy, au jus, onion powder, celery seed and butter until it falls apart. It is easy and always a crowd pleaser.
You can customize this to your family’s taste! You can add cheese, mustard, whatever you want to totally make this recipe your own. A budget friendly meal that can make plenty of leftovers!