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1
Combine ground round, ground chuck, salt and pepper in a large bowl.
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2
In another bowl, combine the coarsely shredded sharp cheddar and cooked bacon pieces.
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3
Let bacon and cheese mixture sit at room temperature for about 20 minutes to get soft.
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4
Then, shape mixture into balls (for however many burgers you would like to make). Form 2 patties of meat and place one cheese/bacon ball in between them.
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5
Pinch the sides together to seal in cheese ball. Gently press formed patty, to spread out cheese ball. Continue until all patties are formed.
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6
Cook burgers on grill over medium flame for about 7 minutes on each side.
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7
While burgers are grilling, slice sweet Vidalia onions and saute them in a skillet with 1 tablespoon of butter. Once onions become translucent (about 4 minutes), add some sweet barbecue sauce.
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8
Flip burgers, and baste the cooked side of the patties with the same sweet barbecue sauce used in the onions.
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9
After about 7 minutes longer, the burger should be done (these are big thick burgers and may take longer to grill to your liking).
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10
Baste again with sweet barbecue sauce before removing from grill.
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11
Butter hamburger buns and place on top rack of grill for several minutes, until toasted.
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12
To build burger, take toasted bun, add patty, and top with smothered barbecue onions. You can add tomato or lettuce, if you'd like, but the flavors are great without them.
