Preheat oven to 350 degrees.
In a mixing bowl, stir together sour cream, cream cheese, spices, and shredded cheese (saving out at least ¼ cup of shredded cheese for topping).
Gently add in the corn kernels (drained if using canned), green chiles, and onions.
Spread mixture into a 2 quart baking dish. Top with remaining shredded cheese.
Bake for approximately 25 minutes, until heated through & cheese is bubbly.
Remove from oven & serve hot with tortilla chips
