Make the burger sauce: stir all the sauce ingredients together in a medium bowl and set aside.
Prep the toppings: finely shred the lettuce, dice the tomatoes, slice the pickles, and shred the cheese using the large holes of a box grater. Make sure the lettuce, tomatoes, and pickles are not too watery; drain or pat dry with paper towels if necessary (this keeps the tacos from getting watery).
Prepare the meat: season the ground beef with spices, but do not add salt yet.
Spread the beef onto the tortillas: divide the meat into 8 portions and spread each portion in a thin, even layer over a tortilla, all the way to the edges (the meat will shrink as it cooks).
Cook the tacos: heat clarified butter or oil over medium-high to high heat (depending on your stovetop). Salt the meat generously right before cooking. Place the tortilla meat-side down in the pan or on a griddle and press firmly with a spatula or a burger press (optional; this helps brown the meat evenly). Cook for 1–2 minutes until well browned, then flip over (a large flat spatula works well) and immediately add cheese. Cook another 1–2 minutes until the tortilla is golden and crisp and the cheese is melted. If using American cheese, it should melt easily; if using shredded cheese, you can cover the tortilla briefly with a melting dome, lid, or heatproof bowl to help it melt. I like to use a crème brûlée torch to melt the cheese.
Keep warm: To keep the tacos warm while cooking the rest, you can place them in the oven on a “keep warm” setting (about 200°F / 95°C).
Assemble: top with pickles, shredded lettuce, tomatoes, and a generous spoonful of sauce. Serve immediately.
Enjoy!