In mixing bowl combine beef, parmesan, milk and parsley and mix until just combined. On a cutting board, roll beef mix into a log and section into 4 1/4 lb patties. Smash patties with your hand until about 1/2 inch in thickness and make an indentation in the center. Salt and pepper each side of burgers to your liking.

Heat your skillet or grill on medium-high and let heat up for about 3-5 minutes. Place patties in pan and let cook for about 5 minutes before turning. You only want to flip burgers once. Continue cooking for an additional 5 minutes.

Meanwhile, in small bowl add your peanut butter and microwave for about 30 seconds or until melted. When burgers are done, drizzle the peanut butter over the tops of each hamburger and top with 1 slices of bacon broken in half. Serve on buns and enjoy!