Prepare the Lime Crema: In a small bowl, stir together the sour cream, cilantro, lime juice, and salt until smooth. If you'd like a thinner sauce for drizzling, stir in extra lime juice. Refrigerate until ready to serve.
Prepare the Seasoning: In a small bowl, stir together the chili powder, cumin, smoked paprika, garlic powder, onion powder, and salt.
Season the Shrimp: Pat the shrimp very dry. In a large bowl, toss the shrimp with 1 tablespoon of olive oil, lime juice, and homemade seasoning blend.
Cook the Shrimp: Heat the remaining 1 tablespoon of olive oil in a large skillet over medium-high heat. Add the shrimp in a single layer and cook for about 2-3 minutes per side, just until pink and opaque.
Warm the Tortillas: If you have a gas stove, turn a few burners to medium heat, place the tortillas on top of the open flames, and cook until just charred, about 15-20 seconds per side (keep a close eye on them!). If you don’t have a gas stove, warm the tortillas in a skillet over medium-high heat, working in batches as needed.
Assemble the Tacos: Fill each tortilla with shrimp. Drizzle with lime crema. Garnish with optional toppings as desired.