Step 1: Prepare the Oven and Casserole Dish
Preheat your oven to 375°F.
Lightly spray a casserole dish with oil to prevent sticking.

Step 2: Season the Chicken
Place the cubed chicken breasts into the prepared casserole dish. Sprinkle with garlic powder, onion powder, salt, and black pepper. Toss everything together so the chicken is well-coated with the seasonings.

Step 3: Create the Creamy Base
Add softened cream cheese and heavy cream directly into the dish with the chicken. Mix everything thoroughly to coat the chicken in the creamy mixture.

Step 4: Add Jalapenos and Cheese
Scatter the diced jalapenos evenly over the top of the chicken and cream sauce. Sprinkle the shredded mature cheddar cheese generously over the entire casserole.

Step 5: Bake the Casserole
Place the dish in the preheated oven and bake uncovered for 40-45 minutes. The chicken should be fully cooked, and the cheese melted and bubbly.

Step 6: Top with Bacon and Serve
Remove the casserole from the oven and sprinkle the cooked, chopped bacon over the top. Let the casserole rest for a few minutes before serving to allow the flavors to settle.