What additional toppings can be added to a burger for an upcharge?

Adding extra cheese and egg as toppings to a burger typically comes with an upcharge because these ingredients are considered premium additions that enhance the overall flavor and richness of the burger. Extra cheese contributes a creamy texture and more complex taste, while a fried egg adds a unique, savory component that many patrons enjoy. Restaurants often charge more for these toppings as they require additional preparation and ingredients that go beyond the standard burger assembly.

In contrast, toppings such as lettuce and tomato are standard condiments that are usually included in the base price of a burger, making them more common and generally not associated with an additional charge. Avocado and jalapeños, while they can be seen as more gourmet options, may not be the focus of the upcharge list in some establishments. Secret sauce and ranch could also be considered condiments included in the meal or available without an additional fee, depending on the restaurant's menu policy. Thus, extra cheese and egg stand out as recognized premium toppings associated with an upcharge in the context of many burger menus.