01 -
Slice onions into 1/4 inch rings, separating them. Heat olive oil in a large skillet over medium heat. Add onions, 1/2 teaspoon kosher salt, and 1/2 teaspoon black pepper, stirring to coat. Cook, stirring occasionally, until onions are translucent and soft, approximately 15 minutes.
02 -
Add 1 cup of Coca-Cola to the skillet with the onions. Stir to combine and continue cooking until the onions are browned, caramelized, very soft, and most of the liquid has evaporated, about 15 to 20 minutes. Remove from heat and set aside.
03 -
In a large bowl, mix ground beef with BBQ sauce, garlic powder, onion powder, 1/2 teaspoon kosher salt, and 1/2 teaspoon black pepper by hand until thoroughly combined.
04 -
Divide mixture into six equal portions and shape into patties approximately 1.25 cm (1/2 inch) thick. Make a slight indentation in the center of each patty to prevent bulging during grilling. Place patties on a tray until ready to grill.
05 -
Preheat grill to medium-high heat. Grill patties for 5 to 8 minutes on the first side. Flip and cook until internal temperature reaches 74°C (165°F) for well done. Place a slice of cheddar cheese atop each patty during the final minute to melt. Remove from heat.
06 -
Place brioche bun bottoms on serving plates. Layer with lettuce leaf, tomato slice, burger patty with melted cheese, half a slice of bacon per burger (broken to fit), and a generous portion of Coca-Cola caramelized onions. Top with bun crown and serve immediately.