KANSAS CITY – Burgers boosted with barbecue sauce are beefing up fast-food restaurant menus.

New from McDonald’s is the Bacon BBQ Burger, made with a quarter-lb. 100 percent beef patty topped with applewood smoked bacon, bourbon barbecue sauce and crispy fried onion strings all served on an artisan roll.

Burger King is building out its line of “King” sandwiches with the new Rodeo Stacker King. The burger features two flame-grilled beef patties layered with two slices of American cheese, thick-cut smoked bacon, crispy onion rings, barbecue sauce and Stacker Sauce on a toasted bun. 

Sonic Drive-In is adding a hefty handheld to its burger lineup. The new Biggie Cheese is made with two 100 percent beef patties, three slices of American cheese, grilled onions, pickles and hickory barbecue sauce stacked double-decker-style on a brioche bun.

“With a whopping three slices of melty cheese and two juicy beef patties, we not only made our classically delicious cheeseburger bigger, we also loaded it up with all the fixings to create a unique Sonic masterpiece,” said Scott Uehlein, vice president of product innovation and development for Sonic. “When big hunger calls, the Biggie Cheese answers to the call to satisfy our guests’ cravings.”

View slideshow of new menu items.