Preheat your oven to 425 degrees.
Combine the seasoning and sour cream, stirring it together until the seasoning is spread consistently throughout.
Add sour cream, pepper jack cheese and green onion to the shredded chicken and stir together.
Place chicken mixture into the bottom of a baking dish, spread in a single layer over the bottom of the dish.
Cover in the cheddar cheese, then bake in the oven for 15 minutes or until the cheese is melted.
Allow to cool before serving. Enjoy!