Mix all ingredients and refrigerate until ready to use.
Glaze
Add all ingredients to a small pot over medium heat. Cook until the mixture start to bubble. Remove from heat and set aside.
Burgers
Divide ground beef into 4 portions. Shape each into patties. Season each patty on both sides with salt, pepper, garlic powder, and onion powder. Heat grill pan over medium heat. When hot, add each burger to the pan. Cook on one side for 5 minutes, then flip over. This is for a medium burger. For medium rare, cook for 4 minutes. For medium well, cook for 6 minutesBrush bourbon glaze on the burger. Cook the second side for 5 minutes as well. Flip again and brush the glaze on the other side.Add 2 slices of Brie to each of the burgers. Cover with a lid for 30 seconds until the cheese is melted. Remove each patty from the pan.
Assemble
Divide each bun. Toast slightly. Place a burger on top on the bottom buns. Add 2 halves of fried bacon to the burgers. Top with sliced shallots and arugula. Spread truffle Mayo on the bottom side of each top bun. Add top buns to burgers and serve.