In a large bowl, combine the beef, bacon and salt. Massage this together using your hands until it is well combined.
Slice the blue cheese into 2mm thin slices.
Toast the buns and prepare all of the other topping ingredients.
Set your burger press to its thinnest setting and press out 8 burger patties.
Working with 2 patties at a time, top one of the patties with some of the sliced blue cheese, leaving just enough space on the edge to seal.
Place the other patty on top of this and gently press the edges down to seal the burger.
Repeat with the remaining patties.
Heat your pan over medium high heat, add the butter and fry the patties for 4 minutes per side. Remove from the pan and serve on the toasted buns with the other prepared toppings.
Recipe by Whats4Chow at https://whats4chow.com/2014/06/02/gourmet-blue-cheese-bacon-burgers/