In a large mixing bowl, combine the ground beef with garlic powder, onion powder, smoked paprika, chili powder, cumin, salt, and black pepper. Mix until just combined.

Preheat your Blackstone griddle over medium-high heat for about 5 minutes.

Divide the beef mixture into four equal portions and form them into balls. Place each ball on the griddle and press down with a spatula to create a flat, thin patty. Cook for about 3-4 minutes until the edges are browned and crispy.

Carefully flip the patties and cook for an additional 3-4 minutes until deep brown crust forms.

Once cooked, sprinkle shredded cheddar cheese on top of each patty and cover to melt for 1-2 minutes.

Prepare your taco shells by sprinkling cornmeal on a clean plate and transferring the crispy beef patties onto the plate.

Assemble the tacos by placing shredded lettuce, diced tomatoes, diced red onion, sour cream, salsa, and chopped cilantro into each beef shell. Add jalapeño if desired.

Serve immediately with lime wedges on the side.