Preheat oven to 350°F (175°C): Lightly grease a 9x13” casserole dish.
Arrange chicken: Lay the chicken breasts in the dish and season with salt, pepper, and garlic powder.
Spread cream cheese: Evenly smother each chicken breast with softened cream cheese.
Add cheddar: Sprinkle shredded cheddar over the cream cheese layer.
Top with bacon and jalapeños: Scatter crumbled bacon and sliced jalapeños evenly across the top.
Cover and bake: Cover with foil and bake for 45 minutes.
Uncover and finish baking: Remove foil and bake for another 15 minutes until the cheese is bubbly and slightly golden.
Rest before serving: Let the dish rest for 5 minutes before serving.