Begin by placing 1 pound of boneless, skinless chicken breasts at the bottom of your slow cooker. Top the chicken with the chopped large onion, allowing its sweet aroma to meld with the meat. Next, pour in the 10.5-ounce can of cream of chicken soup, ensuring the chicken is well-coated. Secure the lid and set your slow cooker to low for 7 hours or high for 3 hours.

Approximately 30 minutes before your Slow Cooker Cheesy Chicken and Rice is done, cook the 8-ounce box of Zatarain's Yellow Rice Mix according to the package instructions. Bring water to a simmer, add the rice, and cover it until tender.

When your slow cooker has finished cooking, carefully remove the chicken using tongs. Place it on a cutting board and shred it with two forks, creating bite-sized pieces. Return the shredded chicken to the slow cooker, mixing it well with the creamy sauce.

Stir in 1 cup of shredded cheddar cheese and the drained 15-ounce can of whole kernel corn into the slow cooker. Replace the lid and let it cook on low for an additional 10-15 minutes, allowing the cheese to melt thoroughly.

Once the cheese has melted into a creamy delight, ladle generous portions onto plates, savoring the combination of tender chicken, fluffy rice, and a luscious cheesy sauce. This dish is perfect for cozy evenings.