Divide the ground beef into 8 equal portions and gently form them into loose balls; avoid overworking the meat. Prepare all your desired taco toppings by chopping and arranging them in separate bowls.

Heat a large griddle or cast-iron skillet over medium-high heat, then add the vegetable oil. Place a beef ball on the hot surface, immediately top it with a tortilla, and firmly smash it flat with a sturdy spatula.

Cook for 1-2 minutes until the burger is crispy and the tortilla is lightly browned. Carefully flip the burger-tortilla combination, immediately place a cheese slice on the hot burger, and cook for another 30-60 seconds until the cheese is melted and the tortilla is warmed.

Remove the smash burger taco from the griddle and transfer it to a plate. Repeat the process with the remaining beef balls, tortillas, and cheese.

Assemble your tacos by adding shredded lettuce, diced onion, pickles, and a drizzle of burger sauce or your preferred condiments to each cheesy smash burger taco. Serve immediately and enjoy.