Neutral oilcanola oil, vegetable oil or cooking spray for coating the pan
1poundground beefpreferably 85% lean/15% fat
1/2teaspoongarlic powder
1/2teaspoononion powder
Salt and freshly ground black pepper
46-inch flour tortillas (fajita size), or corn tortillas, or gluten-free tortillas
4slicesAmerican cheeseor cheese of choice
For Serving
Shredded lettuce
Diced red onion
Diced tomatoes
Avocado
Hot peppers
Instructions
To make the sauce, in a small bowl, combine the mayonnaise, ketchup, relish, mustard, and hot sauce. Mix well and set side.
In a medium bowl, combine beef, onion powder, garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon black pepper. Mix well and shape the mixture into four equal rounds.
Coat a large skillet or griddle with a thin coating of oil (or cooking spray) and preheat to medium-high heat. Place the beef patties on the hot pan, immediately top with the tortillas and press down with a large spatula, grill press, or bottom of a saucepan until the burger is very thin and almost the size of the tortilla. Cook for 2 to 3 minutes, until the beef is nicely seared. If necessary, work in batches to prevent crowding the pan.
Flip and top with the cheese. Cook for 1 to 2 more minutes, until the tortilla is puffed up, golden brown, and crisp and the cheese melts. Be careful not to burn the tortillas.
Remove the smash burger tacos from the pan, garnish with your favorite toppings and the sauce and serve.