01 - Preheat Blackstone griddle or large cast iron skillet over medium-high heat. Lightly oil the cooking surface.
02 - Divide ground beef into 8 equal balls, approximately 2 oz each.
03 - Season each beef ball evenly with salt, black pepper, smoked paprika, and garlic powder.
04 - Place tortilla on griddle. Cover center with shredded cheddar and Monterey Jack cheese mixture.
05 - Place seasoned beef ball atop cheese mound. Press firmly with spatula or burger press to spread thinly over cheese and tortilla.
06 - Cook 2-3 minutes until beef develops crispy edges and cheese becomes golden and bubbly.
07 - Flip entire taco assembly. Cook tortilla side 1-2 minutes until crisp and golden.
08 - Transfer finished tacos to serving platter.
09 - Top each taco immediately with lettuce, tomatoes, red onion, jalapeño slices, cilantro, and sour cream.
10 - Serve hot while cheese remains melted and tortilla stays crispy.