01 - Preheat oven to 425°F and line a baking sheet with parchment paper or lightly grease it.
02 - In a large bowl, combine the shredded chicken, cheddar cheese, Monterey Jack cheese, onion, cilantro, cumin, garlic powder, chili powder, smoked paprika, salt, black pepper, and sour cream if using. Mix thoroughly until all ingredients are evenly distributed.
03 - Wrap tortillas in a damp paper towel and microwave for 30-45 seconds until pliable and easy to roll without cracking.
04 - Place about 2 tablespoons of the chicken filling along one edge of each tortilla. Roll up tightly and place seam-side down on the prepared baking sheet.
05 - Brush or spray the tops and sides of taquitos lightly with vegetable oil to promote even browning.
06 - Bake for 18-22 minutes, or until golden brown and crispy, turning once halfway through for uniform crispiness.
07 - Serve immediately with salsa, guacamole, sour cream, and fresh lime wedges.