This Crockpot Chicken Enchilada Casserole is an easy, cheesy slow cooker dinner packed with tender shredded chicken, red enchilada sauce, sweet corn, black beans, and two kinds of melted cheese. With just a few minutes of prep, this comforting Mexican-inspired casserole is perfect for busy weeknights, family dinners, and meal prep. Finish it with fresh cilantro and a dollop of sour cream for a delicious enchilada-inspired meal without the need to roll tortillas.