Preheat the oven to 350°F (175°C) and grease a 9x13-inch baking dish.
In a large bowl, mix cream cheese, butter, cream of chicken soup, garlic, Italian dressing mix, and chicken stock until smooth.
Add the cooked chicken and rice to the mixture, stirring until well combined.
Spread the mixture evenly into the prepared baking dish.
Sprinkle one cup of shredded Colby Jack cheese over the top.
Bake for 25 minutes, then add the remaining cheese and bake for another 5 minutes until bubbly and golden.
Remove from the oven and let it rest for 5 minutes before serving.
Garnish with fresh parsley and enjoy!