Preheat the oven to 425°F. Lightly spray a 9×13-inch baking dish with non-stick cooking spray.

Trim any excess fat from the 1 pound boneless, skinless chicken breasts, then cut into 1-inch cubes. Place the cubed chicken in a medium mixing bowl.

Add 1 Tablespoon olive oil, 1 teaspoon salt, 1/4 teaspoon ground black pepper, 1/4 teaspoon paprika, 1/2 teaspoon garlic powder, and 1 teaspoon Italian seasoning to the bowl. Toss the chicken until all pieces are evenly coated.

Transfer the seasoned chicken to the prepared baking dish and spread into a single layer.

Dot the chicken with the 2 Tablespoons butter (diced) so the butter is distributed over the top.

Bake in the preheated oven for 15–20 minutes, stirring gently once about halfway through baking to redistribute the butter. Chicken is done when the internal temperature reaches 165°F or no pink remains in the center.

Remove from the oven, let rest for 3–5 minutes, then garnish with fresh chopped parsley and serve.