Mix together sauce mix and beer in a small bowl. Set aside to thicken.
Cook bacon in a pan on medium high heat until crisp, set aside.
Preheat barbecue/grill to medium high heat. In a medium bowl combine ground beef, egg, garlic powder, salt pepper and Worchester sauce.
Form beef mixture into two patties and place on center of grill. Cook 5 minutes (or until bottom is charred) then rotate and cook other side to desired doneness, about 5 minutes more. Top with cheese to melt.
Toast buns if desired and spread with BBQ sauce, and top with burger patties, bacon, lettuce and avocado.