How Long to Cook Chicken Casserole
Any baked casserole containing chicken, such as chicken and rice, chicken enchiladas, or king ranch chicken.
The Short Answer
In the oven at 350°F, chicken casserole takes 30–45 minutes. The USDA-recommended safe internal temperature is 165°F, verified with an instant-read thermometer in the thickest part. Scroll down for all cooking methods, detailed instructions, and tips from the Professor.
Always verify with an instant-read thermometer inserted into the thickest part.
Cooking Methods
🔥 Oven
Temperature: 350°F
Time: 30–45 minutes
Rest: 10 minutes
For a standard 9x13 casserole with pre-cooked chicken. If using raw chicken, increase to 45-60 minutes. Cover with foil for the first 25 minutes, then uncover to brown the top.
Most casserole recipes call for pre-cooked chicken (rotisserie is perfect here). If your recipe uses raw chicken, dice it small so it cooks through evenly in the time the casserole needs.
Frequently Asked Questions
Yes. Assemble, cover tightly, and refrigerate overnight. Add 10-15 minutes to the baking time since it is going in cold. Let it sit at room temperature for 20 minutes before baking if possible.
The Bottom Line
Chicken Casserole is straightforward to cook when you know the time and temperature. The most important number to remember is 165°F internal. An instant-read thermometer is the only reliable way to confirm doneness; color and firmness are not accurate indicators. Use the method that fits your equipment and schedule, and always let the food rest before cutting or serving. Resting allows juices to redistribute and carryover cooking to finish the job.
Source: USDA Safe Minimum Internal Temperatures | Last verified: March 19, 2026 | Our methodology