Continuing to try to cement its reputation as selling a better class of burger, Wendy's is selling a bacon cheeseburger that sits on a pretzel-esque bun.

Judging by some of the photos and comments posted on social media, mainly from users that appear to be in the Miami Florida area, the buns are beefier and thicker than the usual patty bread. The tops of the buns feature a cross split, similar to what you might find on a Swiss or German-style pretzel bun.

Reached for comment, Wendy's Senior Vice President of Communications Denny Lynch said that it was Wendy's policy not to comment on test products.

During an investor meeting this summer, Wendy's executives discussed exploring using pretzel buns on a "pub club" type sandwich. Wendy's would be selling ""five star quality breads at three-star pricing," Gerard Lewis, head of innovation at Wendy's, told the conference.

Though it appears to only be launched in a small test market, the possibility of a Pretzel Bacon Cheeseburger would mark the latest "fast food innovation" to come out lately as brands fight for mind, and stomach, share.

In 2010, KFC launched the Double Down, with two pieces of chicken as the sandwich "buns" enclosing two strips of bacon and special sauce. That same year, Burger King unveiled the "Pizza Burger," an over-sized burger pie draped in mozzarella, pepperoni, and pesto and marinara sauce. Likewise, in 2010 Friendly's came out with Grilled Cheese Burger Melt, in which two grilled cheese sandwiches were used as the buns for a burger.