"This is a burger that breaks all the rules," Robert Irvine reveals of the piled-high Bacon Mac & Cheese Burger at Guy Fieri's Kitchen & Bar in Las Vegas. This monster of a between-the-bun meal features a hearty beef patty topped with a scoop of macaroni and cheese, plus a blanket of a cheese slice, as well as strips of smoky bacon and a smear of Guy's craved mayonnaise-based donkey sauce. "It's big, it's bold and it's decadent," according to Robert.