Final answer:
The A-1 Thick & Hearty burger was retired from Whataburger's menu in 2015.
Step-by-step explanation:
The A-1 Thick & Hearty burger was retired from Whataburger's menu in 2015. The A-1 Thick & Hearty burger was a popular menu item at Whataburger for many years. It was a burger topped with two slices of American cheese, grilled onions, and A-1 Sauce.