01 - Whisk together mayonnaise, ketchup, mustard, chopped pickles, garlic powder, onion powder, smoked paprika, salt, and pepper in a small bowl until fully incorporated. Set aside to allow flavors to meld.
02 - Divide ground beef into 8 equal portions, approximately 2 oz each. Roll into loose balls and season lightly with salt and pepper on all sides.
03 - Heat a large cast iron skillet or griddle over medium-high heat until smoking hot, approximately 3-5 minutes. The surface must be sufficiently hot to achieve proper searing.
04 - Place 2-3 beef balls onto the hot skillet. Immediately press a tortilla onto each ball and flatten firmly with a sturdy spatula or burger press, pressing the beef thinly against the tortilla. Cook for 2-3 minutes until deeply browned with crispy edges.
05 - Carefully flip each assembly so the tortilla contacts the skillet directly. Place a cheese slice on each beef patty. Continue cooking for 1-2 minutes until the tortilla is golden brown and spotted with char, and the cheese is completely melted.
06 - Remove cooked tacos to a platter and repeat the cooking process with remaining beef balls and tortillas, working in batches to avoid overcrowding the pan.
07 - Top each smash burger taco with shredded lettuce, diced tomatoes, sliced red onion, and pickle chips. Drizzle generously with the prepared sauce and serve immediately while hot.