Pre-heat oven to 350 degrees Farenheit. Using a stand mixer, fitted with a paddle attachment, place the softened cream cheese in the bowl, and beat until whipped and fluffy.
Once the cream cheese is fluffy add the sour cream, buffalo sauce, blue cheese, 3/4 cups cheddar cheese, parsley, onion flakes, and diced chicken. Beat for one minute on medium-low until all the ingredients are well incorporated.
Spay the cooking spray in an oven-proof glass pie plate. Carefully transfer the buffalo chicken mixture into the bowl. Sprinkle the remaining cheddar cheese on top of the dip. Bake for 20-25 minutes until golden brown.
Serve hot immediately with tortilla, corn chips or even veggies.