A hamburger steak is just ground beef, salt, and pepper. It’s really much more of a simple hamburger than a “steak”. A Salisbury steak includes eggs, breadcrumbs, seasonings, mustard, Worcestershire sauce, and liquid smoke–and all those ingredients make these super tender and moist. Salisbury steak also includes a mushroom gravy, which goes beautifully with mashed potatoes, rice, or any other sides you like.