01 -
Heat olive oil in a large skillet over medium heat. Add onion rings, ½ tablespoon kosher salt, and ½ teaspoon black pepper; stir to coat. Cook, stirring occasionally, until translucent and soft, about 15 minutes.
02 -
Pour Coca-Cola into the skillet with onions. Continue cooking, stirring occasionally, until onions are caramelized and almost all liquid has evaporated, approximately 15-20 minutes. Remove from heat and set aside.
03 -
In a large bowl, combine ground beef, barbecue sauce, garlic powder, onion powder, remaining ½ tablespoon kosher salt, and ½ teaspoon black pepper. Mix thoroughly by hand until evenly incorporated.
04 -
Divide the meat mixture into six equal portions. Shape each into a patty about ¾ inch thick. Indent the center of each patty slightly to prevent bulging during cooking. Place patties on a tray and set aside until grilling.
05 -
Preheat grill to medium-high heat. Grill patties for 5 to 8 minutes on the first side. Flip and continue grilling until internal temperature reaches 74°C (165°F), about 5 to 7 minutes more. Remove from grill and top each with a slice of cheddar cheese to melt.
06 -
Grill bacon slices until crisp, about 3 to 5 minutes per side. Remove and drain on paper towels.
07 -
Place brioche bun bottoms on plates. Layer with lettuce, tomato slice, a cheese-topped burger patty, two bacon slices broken to fit, and a generous portion of Coca-Cola caramelized onions. Cap with top bun and serve immediately.