McDonald's best-selling menu item may not come as a surprise, but it probably won't be the first thing that you guess despite ...

You might think that the best-selling McDonald's menu item is a meaty entrée like a burger or chicken nuggets. The carby reality may surprise you.

McDonald's testing guacamole toppings on three of its best-selling sandwiches. Guacamole is being tested on menus in the Carolinas and in Denver, Colorado; ...