Preheat oven to 350°F. Grease a 9x13-inch baking pan and set aside.
Mix Jiffy corn mix, whole kernel corn, creamed corn, eggs, butter, sour cream, and black pepper, and spread evenly into the greased pan.
Bake for 40-45 minutes or until cooked through.
Video
Notes
Make corn casserole a day in advance and store it in the refrigerator until ready to bake.
Refrigerate leftovers wrapped in aluminum foil or in an airtight container for up to 4 days. Freeze cooled corn casserole for up to 6 months in an airtight container.
To reheat, defrost in the refrigerator, then heat in a 350˚F oven until heated through.