Preheat your oven to 350°F (175°C) to prepare a warm environment for baking.
In a large mixing bowl, combine the shredded chicken with the softened cream cheese and sour cream. Then, add 1/2 cup of the shredded Monterey Jack cheese, chopped green onions, garlic powder, onion powder, salt, and pepper. Mix thoroughly until all ingredients are well incorporated and the mixture is creamy.
Lay one flour tortilla on a clean surface. Spoon about 1/4 cup of the chicken mixture into the center of the tortilla. Gently roll the tortilla tightly around the filling and place it seam-side down in a greased 9x13 inch baking dish. Repeat this process with the remaining tortillas until all the filling is used.
Once all the rolled tortillas are nestled in the dish, pour the green enchilada sauce evenly over the entire surface of the tortillas, ensuring they are well covered.
Evenly sprinkle the remaining 1/2 cup of shredded Monterey Jack cheese over the sauce for that indulgent, cheesy topping.
Cover the baking dish with aluminum foil to trap the heat and moisture, then bake in the preheated oven for 20 minutes.
After 20 minutes, carefully remove the foil and continue baking for an additional 10 minutes, or until the cheese on top is bubbly and has turned a lovely golden color.
Once you remove the baking dish from the oven, allow the enchiladas to cool slightly for about 5 minutes. Garnish generously with fresh cilantro for a pop of color and herbaceous flavor. Serve hot and enjoy a delicious serving of creamy comfort!