Start by heating your oven to 375°F (190°C). Lightly grease your casserole dish so the cheese doesn’t stick during baking.
If you’re cooking fresh chicken breasts, boil or bake them until they’re done. Shred the meat using two forks. If you’re short on time, rotisserie chicken works just as well and adds extra flavor.
In a large bowl, stir together the barbecue sauce, ranch seasoning, milk, and sour cream. Make sure the mix is smooth and creamy. This combo creates the base flavor that makes this dish irresistible.
Add the shredded chicken, cooked pasta, corn, and half the cheddar and mozzarella to the sauce bowl. Stir everything until well coated. It should look creamy and colorful!
Pour the mixture into your greased casserole dish. Sprinkle the remaining cheese evenly on top. Then, crumble the cooked bacon over the cheese layer.
Bake for about 25 to 30 minutes. When the top is golden and bubbly, it’s ready! Let it cool for 5 minutes before serving so the cheese sets nicely.