My family's version of that cornbake recipe:
1 Box Jiffy Corn Muffin Mix
1 Stick Butter (melted)
1 can cream corn
1 can (drained) corn
1 cup sour cream
2 eggs
Bake 45-50 minutes at 350°
So, fewer eggs, less sour cream, and less butter. (And more corn) It's still amazing.
Of note, if you use a glass pan you can melt the butter in the pan in the microwave and use the melted butter to coat the pan before mixed everything else in.