A versatile casserole recipe that allows you to mix and match ingredients to suit your taste and pantry.
Preheat your oven to 350°F (175°C).
Ensure the oven is fully preheated before placing the casserole inside for even cooking.
In a large mixing bowl, combine the sour cream, milk, salt, and pepper.
Whisk the ingredients together until smooth for a consistent sauce.
Add the cooked chicken, pasta, and mushrooms to the bowl and mix well.
Ensure all ingredients are evenly coated with the sauce for uniform flavor.
Transfer the mixture to a greased baking dish and spread evenly.
Use a spatula to smooth the top for even cooking.
Sprinkle the shredded cheese over the top.
Cover the entire surface for a golden, bubbly crust.
Bake in the preheated oven for 40 minutes, or until bubbly and golden.
Check the casserole halfway through to ensure even cooking.
Let the casserole rest for 5 minutes before serving.
Allowing the casserole to rest helps it set and makes serving easier.