In a large bowl, whisk together the beaten eggs, drained whole kernel corn, cream-style corn, corn muffin mix, sour cream, melted butter, salt, and black pepper until well combined.
Grease the inside of a 6-quart crock-pot with non-stick cooking spray or butter.
Transfer the corn mixture into the greased crock-pot and spread it out evenly.
Cover the crock-pot and cook on low for 3 to 4 hours, or until the casserole is set in the middle and the edges are golden brown.
Once cooked, let the casserole stand for about 5 minutes before serving.