What is the primary reason for toasting the buns golden brown?

Toasting the buns to a golden brown is primarily done to prevent the bun from becoming soggy. When buns are toasted, they develop a slightly crispy exterior that helps to create a barrier against moisture from the burger and other toppings. This prevents the bun from absorbing too much liquid, thus maintaining its structure and texture throughout the meal. A soggy bun would detract from the overall eating experience, making it less enjoyable for customers.

While enhancing flavor and improving presentation are valid considerations when preparing a burger, the main functional reason for toasting the buns is to ensure that they remain firm and do not become mushy. Shortening cooking time is not a goal of toasting; instead, the process itself typically involves a bit more time compared to using untoasted buns.