Preheat the oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Cook the chicken (if not already cooked). Season it lightly with salt, pepper, and garlic powder, then shred or dice it.
Prepare the sauce: In a large bowl, combine softened cream cheese, sour cream, shredded cheese, chopped jalapeños, and seasonings. Mix until smooth.
Assemble the casserole: Spread the chicken evenly in the baking dish, then pour the cheese mixture over the top. Use a spatula to smooth it out.
Add toppings: Sprinkle with cooked bacon and optional breadcrumbs or pork rinds.
Bake for 20–25 minutes, or until hot and bubbly. If the top isn’t golden enough, broil for 2–3 minutes at the end.
Let cool slightly before serving.