Delicious In-N-Out Smash Burger Tacos made with ground beef, cheddar cheese, chopped lettuce, and topped with a special In-N-Out sauce, all served in mini taco shells.
1: Prepare the Sauce: In a bowl, combine the mayonnaise, ketchup, Worcestershire sauce, Dijon mustard, caramelized onions, sweet relish, vinegar, salt, and black pepper. Mix well and refrigerate for at least 30 minutes.
2: Prepare the Ground Beef: Heat a skillet over high heat with a small amount of oil. Place 2-3 tablespoons of ground beef in the center of each tortilla, pressing down gently to create an even layer. Sprinkle with salt. Cook in the skillet (meat side down) over medium-low heat for 4-5 minutes or until cooked through. Flip and cook the other side until crispy and golden.
3: Assemble the Tacos: Top each taco with a slice of cheddar cheese, chopped lettuce, and caramelized onions. Drizzle with In-N-Out Sauce.
