01 -
Set oven to 350°F (175°C) to allow proper preheating.
02 -
Grease a 9x13-inch baking dish with non-stick spray or butter to prevent sticking.
03 -
In a large mixing bowl, whisk together the melted butter, sour cream, eggs, corn kernels, and creamed corn until evenly incorporated.
04 -
Gradually fold in the corn muffin mix, stirring until a uniform batter forms. Do not overmix.
05 -
Pour the batter into the prepared baking dish, spreading evenly with a spatula.
06 -
Place the dish in the oven and bake for 25 minutes, or until the casserole is set and golden brown on top.
07 -
Remove from oven and let cool for 5 minutes before slicing and serving warm.