Gather all your ingredients.
Mix ground beef, minced onion, Worcestershire, salt, garlic powder, and black pepper in a large bowl. Divide into 6 equal balls and press each ball down onto tortillas.
Heat oil in a medium skillet over medium heat. Place a tortilla into the skillet, meat side down, pressing down with a spatula to cook. Cook for 2-3 minutes while pressing down, and flip when browned and crispy.
Flip the tortilla, top with a cheese slice, and cook 2 more minutes until the cheese melts.
Repeat with the remaining tortillas.
Top your smash burger tacos with shredded lettuce, pickle chips, and Thousand Island dressing. Serve and enjoy!
