Preheat the oven to 400℉. Grease a skillet with butter or oil generously.
In a medium bowl, combine the corn bread mix, melted butter, sour cream, eggs, buttermilk, corn kernels, cheddar cheese, and green onions together until well combined and no lumps remain.
Pour the mixture into the greased skillet in an even layer.
Bake in the oven for 25-30 minutes or until cooked through and golden brown.