Preheat the oven to 350°F (175°C).
In a large mixing bowl, combine the shredded chicken, softened cream cheese, half of the shredded cheddar cheese (½ cup), and diced jalapeños. Season with garlic powder, onion powder, cumin, salt, and pepper. Mix well until creamy and combined.
In a separate bowl, whisk together the sour cream and chicken broth to make your creamy sauce.
Spread about ½ cup of the creamy sauce on the bottom of the 9x13-inch baking dish.
Take one tortilla and add about ½ cup of the chicken mixture to it. Roll the tortilla tightly and place it seam-side down in the baking dish. Repeat with the remaining tortillas and chicken mixture.
Pour the remaining creamy sauce evenly over the top of the enchiladas and sprinkle the remaining cheddar cheese over the sauce.
Bake in the preheated oven for 25-30 minutes or until the top is bubbly and golden.
Remove from the oven and let it cool for a few minutes. Garnish with fresh cilantro if desired before serving.