01 - Set your grill or grill pan to medium-high heat and allow it to reach full temperature before cooking.
02 - In a small mixing bowl, combine the ground coffee, brown sugar, smoked paprika, chili powder, garlic powder, onion powder, and cayenne pepper. Stir until all spices are evenly distributed.
03 - Divide the ground beef into 4 equal portions and shape each into a patty slightly wider than the burger buns to account for shrinkage. Season both sides generously with kosher salt, black pepper, and the coffee rub, pressing the seasoning gently into the meat so it adheres.
04 - In a small saucepan, combine the ketchup, apple cider vinegar, brown sugar, Worcestershire sauce, liquid smoke, smoked paprika, garlic powder, black pepper, and salt. Place over medium-low heat and simmer for 5 to 7 minutes, stirring occasionally, until the sauce thickens. Remove from heat and set aside.
05 - Place the seasoned patties on the hot grill and cook for 4 minutes undisturbed. Flip each patty, top with a slice of cheddar cheese if desired, and continue grilling for another 3 to 4 minutes for medium doneness. During the final minute, place the burger buns cut-side down on the grill to toast.
06 - Spread a generous spoonful of smoky BBQ sauce on the bottom half of each toasted bun. Layer with a lettuce leaf, the coffee-rubbed burger patty, a tomato slice, red onion rings, pickle chips, and an additional drizzle of sauce. Cap with the top bun and serve immediately while hot.