01 - Preheat Blackstone griddle or large cast iron skillet over medium-high heat. Lightly oil the surface.
02 - Divide ground beef into 8 equal portions, approximately 2 oz each. Roll into balls.
03 - Season each beef ball evenly with salt, black pepper, smoked paprika, and garlic powder.
04 - Place tortilla on griddle. Mound shredded cheddar and Monterey Jack blend in center of tortilla.
05 - Place seasoned beef ball atop cheese. Using sturdy spatula or burger press, smash firmly to spread beef thinly over melted cheese and tortilla.
06 - Cook for 2-3 minutes until beef develops crispy edges and cheese becomes golden and bubbly.
07 - Flip entire taco assembly quickly. Cook tortilla side for 1-2 minutes until crispy.
08 - Transfer to serving platter. Top each taco immediately with lettuce, tomatoes, red onion, jalapeño slices, cilantro, and dollop of sour cream.