Preheat the oven to 350°F. Brush a 10-inch cast iron skillet or 9-inch baking dish with vegetable oil.
Steam the corn per the package directions then drain and cool slightly.
In a medium bowl whisk together cream corn, butter, milk, eggs and granulated garlic until fully combined.
To the bowl add steamed corn, corn muffin mix, 1 1/2 cups cheese and green onions. Mix to fully combine.
Spread evenly in the pan. Top with the reserved 1/2 cup cheddar cheese.
Bake for 30-40 minutes or until the center is set when gently shaken.
Scoop and serve immediately.
Notes
Herb Substitutions: You could use snipped fresh chives in place of green onions.
Green Chiles: You could use hatch green chiles in place of diced anaheim chiles.
Cheese: You can swap out the flavor of the shredded cheese, as well. You could use Gruyere cheese for a nutty elevated flavor, monterey jack cheese for a creamy mild flavor or use the same amount of pepper jack cheese to add extra spice.