Today’s signature burgers run the gamut from super-premium beef mixtures to patties made from poultry, lamb, pork, seafood, and—increasingly—vegetarian and vegan options made of plants. And since a burger is the sum of its parts, operators are also going all out with distinctive carriers, sauces, toppings, and condiments. This trend toward creative burger variations has also made it increasingly common for upscale and chef-driven restaurants to offer top-shelf burger specialties whose price point mirrors those of other entrées on the menu.