In a frying pan, start cooking the bacon. While the bacon is frying, cut up the onion and set aside. Finish cooking the bacon and remove and put on paper towels.
Butter the buns and set aside.
Drain the skillet that has the bacon grease into a bowl and set aside. (you will use this pan for the burgers).
Make 5 patties out of the ground beef and place in the skillet. Fry on medium heat until cooked thoroughly.
In the meantime in another skillet, lightly toast the buns. Set aside.
By this time the burgers should be ¾ of the way done, add cheese to the top of the burgers to melt. Put the burgers on a paper towel whenever finished.
In the meantime, pour a little bacon grease in the same skillet used for the buns and add the onions and burger seasoning and saute for up to 3 minutes. Add the BBQ sauce directly to the onions and heat for about 1 minute.
Dress your burgers, add the patty and cross the bacon on top then add the BBQ onion mixture. Serve right away.