Preheat the oven to 350°F. Spray a 9 inch square or 2 quart baking dish with nonstick cooking spray.
In a large bowl, whisk together sour cream, melted butter, egg, pepper, onion powder and garlic powder until combined.
¾ cup sour cream, ½ cup salted butter, 1 large egg, ½ teaspoon freshly ground black pepper, ½ teaspoon onion powder, ¼ teaspoon garlic powder
Add corn muffin mix, creamed corn, whole kernel corn, cheese and green onions and stir just until combined.
8 ounces corn muffin mix, 15 ounces creamed corn, 15 ounces whole kernel corn, 4 ounces pepper jack cheese, 3 green onions
Transfer to the prepared pan and smooth the top.
Bake for 45 to 55 minutes or until edges are golden brown and center isn't jiggly.
Let cool for 10 minutes before serving. Enjoy!