Preheat oven to 375°F (190°C). Spray a 9×13 inch baking dish generously with cooking spray or brush with oil.
In a large bowl, combine shredded chicken, 3/4 cup queso sauce, sour cream, cilantro, onion, garlic, cumin, chili powder, salt, and pepper. Mix until evenly distributed and creamy.
Warm tortillas in microwave for 15-20 seconds wrapped in damp paper towel. Spoon about 1/3 cup of chicken mixture down center of each tortilla.
Roll each tortilla tightly around filling and place seam-side down in prepared baking dish, arranging them close together.
Pour remaining 1/4 cup queso sauce over enchiladas. Sprinkle with shredded Mexican cheese blend.
Bake uncovered for 20-25 minutes, until cheese is melted, bubbly, and lightly golden brown.
Let rest for 3-5 minutes. Garnish with additional cilantro and green onions before serving.
Notes
Use rotisserie chicken to save time. For extra spice, add 2 tablespoons diced jalapeños to the filling.
Warm tortillas before rolling to prevent cracking. Don’t overfill tortillas – stick to 1/3 cup filling to make rolling easier.
Can assemble up to 24 hours ahead and refrigerate before baking. Add 5-10 minutes to baking time if baking from cold.