This was the Burger Of The Day in the episode "Torpedo" and the first thing you'll notice from the ingredients is that we are apparently living in a parallel universe in which Cracker Jacks never had the "S" on the end.
This seems like one of the less plausible sandwiches from Bob's signs and the joke is, of course, that this is the kind of ridiculous thing someone would only eat in a cartoon. They were wrong.
It was fucking delicious. To the point where I'd seriously consider putting Cracker Jack(s) on every burger I eat going forward. I'm completely blown away.
I thought the caramel corn would be hard little tooth shattering danger nuggets, but they were soft and melty and crisp, with this perfect burnt sugar flavor that complimented the smoky burger char. What was I afraid of? This experiment will be a breeze!