Cook the beef: In a skillet over medium-high heat, add olive oil. Once hot, add the ground beef and seasonings (chili powder, garlic powder, onion powder, smoked paprika, and cumin). Cook for 8 to 10 minutes, breaking up the meat until fully browned. Drain excess fat if needed and let cool slightly.
Make the dressing: In a small bowl, mix together sour cream and salsa. Add fresh lime juice to taste. If the dressing is too thick, add a little water or extra lime juice to thin it out.
Assemble the salad: In a large mixing bowl, combine chopped romaine, tomatoes, red onion, cheese, corn, black beans, avocado, and cilantro.
Add the beef and chips: Once the beef has cooled a bit, add it to the salad. Toss in the Doritos.
Dress and serve: Toss the salad with the dressing or drizzle on top. Season with salt and pepper. Serve immediately for the best texture.