Answer: To Show Off the Quality of the Meat
It turns out that the old saying “don’t cut corners” has a very unique meaning for one of America’s favorite burger joints. As you probably already know, Wendy’s serves up square patties, not the circular variety you see virtually everywhere else in the world. Here’s the logic. Way back when Wendy’s founder Dave Thomas was getting the iconic chain off the ground he “wanted to make sure that the patty sticks out of the bun so that everyone can see it, see the juiciness,” Frank Vamos, director of brand communications for the company, told Thrillist.
Thomas’ grandmother is said to have repeated that idiom to her grandson as he was starting the company. That being said, the square edges are not only a practical way to show off the quality of the meat, but also nod to an American founder’s desire to do things the right way, without shortcuts.