In my experience, if the beef is fresh, high quality, and the right cut, grind and fat content, all it needs is salt on the surface at the time of cooking. The

In my experience, if the beef is fresh, high quality, and the right cut, grind and fat content, all it needs is salt on the surface at the time of cooking. The salt mixed into many pre-made patties makes them increasingly rubbery the longer they sit in the supermarket. The seasonings are usually a crapshoot. Toppings are a separate matter. Go to town.