Preheat the oven to 375°F. Butter a 9 x 9 inch baking dish. Set aside.
Whisk together the cornmeal, cream corn. sour cream, milk, vegetable oil, sugar, green chilies and eggs.
Mix in cooked and crumbled chorizo sausage, 1 1/2 cup shredded cheddar cheese, and green onion by hand.
Pour into the baking dish and sprinkle the top with the remaining cheese.
Bake for 45 minutes until a toothpick inserted into the center show moist crumbs. Cut into squares and serve.