Preheat your oven to 350°F (175°C) to ensure even baking.
In a large mixing bowl, combine the shredded rotisserie chicken, cooked white rice, rinsed black beans, corn kernels, sour cream, sliced green onions, ground cumin, and 2 cups of the cheddar cheese.
Using a spatula, gently mix all the ingredients together until well incorporated.
Pour the mixture into a greased 9x13 inch baking dish, spreading it out evenly.
Sprinkle the remaining ½ cup of cheddar cheese on top.
Bake in the preheated oven for about 25-30 minutes, until bubbly and slightly golden.
Let the dip cool for a few minutes before serving with tortilla chips.