01 - Preheat a large nonstick skillet or griddle over medium-high heat until hot.
02 - Divide the ground beef into 4 equal portions and shape into loose balls.
03 - Place one beef ball onto one half of each tortilla. Season each portion with salt, pepper, garlic powder, and smoked paprika.
04 - Using a spatula or parchment paper and a heavy pan, smash each beef ball thinly and evenly onto the tortilla surface.
05 - Sprinkle a generous amount of shredded cheddar cheese over the smashed beef on each tortilla.
06 - Fold each tortilla over to form a half-moon shape, pressing gently to seal.
07 - Add 1/2 tbsp butter to the skillet. Place quesadillas in the pan, working in batches if necessary. Cook 2-3 minutes until the tortilla is golden and crisp.
08 - Flip quesadillas, adding remaining butter as needed. Cook another 2-3 minutes until beef is fully cooked and tortilla is crispy.
09 - Remove from skillet and let rest for 1 minute to allow juices to redistribute.
10 - Carefully open each quesadilla and layer with lettuce, tomato, onion, pickles, and a spoonful of burger sauce.
11 - Close quesadillas and slice into wedges. Serve immediately while hot and crispy.