In a large bowl, gently combine the ground beef, breadcrumbs, egg, salt, and pepper. Do not overmix.
Form the mixture into 4 equal-sized patties.
In a small bowl, whisk together all the peanut butter sauce ingredients until smooth.
Heat a grill or skillet over medium-high heat. Cook the burgers for about 4-5 minutes per side, or until cooked to your desired doneness.
During the last minute of cooking, spread some of the peanut butter sauce on top of each burger patty.
Toast the burger buns lightly if desired.
Assemble the burgers by placing a patty on the bottom half of each bun, topping with bacon, lettuce, and pickles, and then the top bun. Drizzle with extra peanut butter sauce if desired.
Notes
These peanut butter burgers are perfect for a backyard BBQ or a fun weeknight meal. The combination of savory and sweet is surprisingly delicious!