01 -
Preheat oven to 400°F (204°C). Line a large rimmed baking sheet with aluminum foil and place an oven-safe wire rack on top.
02 -
In a large bowl, gently mix ground beef with 2 tablespoons barbecue sauce, salt, and black pepper. Mix just until evenly distributed to prevent overworking the meat.
03 -
Portion the beef mixture into four equal parts. Shape each into a patty about 4 ounces, 3.5 inches in diameter, and 0.5 inch thick.
04 -
Arrange two bacon slices in an X on a work surface. Place one patty in the center, position one pineapple slice atop the patty, then wrap the bacon ends over. Secure with a toothpick.
05 -
Repeat bacon-wrapping with remaining patties. Position each assembled burger on the prepared wire rack.
06 -
Bake for 15 minutes. Remove pan, brush tops and sides with remaining 2 tablespoons barbecue sauce. Return to oven and bake 10-15 minutes longer, until bacon is browned and burgers reach 160°F (71°C) internal temperature.
07 -
While burgers finish cooking, optionally toast burger buns until lightly golden.
08 -
Allow burgers to rest 5 minutes for juices to redistribute. Serve each patty and pineapple portion on a toasted bun with desired condiments.