Preheat the oven to 350℉.
In a bowl, add in the sour cream, egg, butter, and mix until smooth. Next, fold in the drained can corn and creamed corn. Lastly, mix in the bag of Jiffy.
Pour all the contents into the baking dish. Place in the preheated oven and bake for 45-55 minutes. You want some cracks across the top although it may only be browned around the edges. A little jiggle is fine, but you want the corn souffle to be set.
Remove from oven, allow to settle and cool for 10-15 minutes before serving.