One of the keys to the burger’s enduring popularity is the iconic American patty’s wide open possibilities for creativity.

At the Backdoor Grill in Steamboat Springs, Colo., the menu’s lineup of “Old School Burgers" is joined by its “New School Burgers.” The New School roster includes the How Ya Doin (with cream cheese, jalapeno jelly and bacon) and the Black Mamba 24 (with Snake River Farms Kobe beef, black truffle aioli, smoked sautéed onion, fried egg, and Gouda on a brioche bun).