01 - Combine chili powder, cumin, smoked paprika, garlic powder, onion powder, oregano, cayenne pepper, kosher salt, and black pepper in a small bowl. Mix thoroughly and set aside.
02 - Heat a large skillet over medium-high heat. Add ground beef, breaking it apart with a wooden spoon. Cook for 5-6 minutes until fully browned. Drain excess fat if necessary.
03 - Sprinkle the prepared seasoning mix evenly over the browned beef. Stir well to distribute spices throughout the meat.
04 - Pour in water and add tomato paste. Reduce heat to medium and simmer for 4-5 minutes, stirring frequently until the sauce thickens and coats the beef. Adjust seasoning to taste.
05 - Heat tortillas in a dry skillet, microwave, or directly over a gas flame until warm and pliable.
06 - Spoon seasoned beef into warm tortillas. Top with lettuce, tomatoes, cheese, red onion, cilantro, avocado, sour cream, and salsa as desired.
07 - Arrange tacos on a serving platter and serve immediately while hot.