For 4 servings
Mix paprika, cumin, garlic powder, salt, and pepper. Coat chicken thighs on all sides.
Heat oil in a cast iron skillet over medium-high heat. Cook chicken 5–6 minutes per side until cooked through and nicely charred.
Rest chicken 5 minutes, then slice or chop.
Mix sour cream with lime juice and a pinch of salt to make the lime crema.
Warm tortillas directly over a gas flame or in a dry skillet until slightly charred.
Assemble tacos: tortilla, chicken, salsa, pickled onions, cotija, a drizzle of crema.
Serve with lime wedges.