In a bowl, mix together your Big Mac sauce ingredients: mayonnaise, ketchup, mustard, finely diced pickles, and a pinch of paprika. Set aside.
In a mixing bowl, combine the ground beef with seasoned salt and black pepper. Mix gently until combined.
Heat the large skillet or griddle over medium-high heat.
Divide the seasoned ground beef into 8 equal portions, smash each portion into thin patties, and cook for 2-3 minutes until a crust forms. Flip and add cheese.
Cover briefly with a lid to melt the cheese (1-2 minutes).
Warm the flour tortillas in a separate pan or microwave until soft.
Assemble the tacos with a cheesy patty, shredded lettuce, diced onion, pickles, and Big Mac sauce.
Serve immediately while hot and cheesy.