In a small, microwaveable dish, melt butter. (Usually about 15-30 seconds is long enough.)
In a large mixing bowl, pour in drained corn, cream-style corn, sour cream and melted butter. Stir to combine.
Pour in corn bread mix and stir to evenly combine.
Pour in corn mixture in to a GREASED, 8x8 or 9x9 square baking dish.
Place dish on middle rack in oven and bake at 350 degrees for 40-45 minutes or until golden brown.
Video
Notes
How to Store LeftoversIf you have leftovers of this creamy jiffy corn casserole, wait until it cools to about room temperature and store in an airtight container, in the refrigerator for up to 5 days.