Preheat Oven and Prepare Dish: Preheat oven to 375 degrees F (190 degrees C). Coat an 8x8-inch baking dish with nonstick cooking spray and set aside.
Whisk Eggs: In a large mixing bowl, whisk eggs until well beaten.
Combine Wet Ingredients: Add sour cream and melted butter to the eggs. Mix until everything is well combined and smooth.
Add Corn: Add both cans of corn (regular and creamed) to the mixture. Stir until combined.
Mix in Jiffy Corn Muffin Mix: Add Jiffy mix to the bowl and stir until everything is fully incorporated. Make sure there are no lumps of dry mix remaining.
Transfer to Baking Dish: Pour mixture into the prepared baking dish. Use a rubber spatula to smooth it into an even layer.
Bake: Bake uncovered for 40 minutes. After 40 minutes, check to ensure the top is golden, the edges are cooked, and the middle is firm to the touch. If the center still feels soft, bake for an additional 5-10 minutes as needed.
Cool Before Serving: Remove from oven and let sit for 10-15 minutes before slicing and serving. Optionally, grind a little fresh pepper on top of slices.
