Start by greasing your crockpot with a bit of cooking spray or butter.

In a mixing bowl, combine the drained sweet corn, cream-style corn, corn muffin mix, sour cream, melted butter, cheddar cheese, salt, and pepper. Stir until well mixed.

Transfer the mixture into the prepared crockpot, spreading it evenly.

Cover the crockpot and set it to cook on low for 4 hours.

After 4 hours, check if the casserole is set in the middle.

If desired, sprinkle some extra cheese on top during the last 15 minutes of cooking.

Once cooked, turn off the crockpot and let it sit for about 10 minutes before serving.

Scoop out portions with a spatula and serve warm.