Fresh off its success with Taco Fries, Taco Bell is testing a handful of new products — including a French Toast Chalupa for its breakfast menu. With 53 million orders sold, Taco Fries surpassed Doritos Locos Tacos at the most popular new menu item at Taco Bell, which is based in Irving, Calif., and is a division of Louisville-based Yum Brands Inc.