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French Onion Chicken Casserole has classic French flavors, tender chicken, and lots and lots of cheese. What more could you want? This is one of my family’s favorite dishes. Serve it over mashed potatoes, rice, or cooked noodles for an easy and delicious meal.
Ingredients for French Onion Chicken Casserole
- yellow onion
- chicken breasts
- can French onion soup
- balsamic vinegar
- mozzarella cheese
How to Make French Onion Chicken Casserole
Cook the onions in the butter in a large skillet over medium heat. Bring them up to a simmer, then put the lid on the pan and turn the heat to low. Let the onions cook for 10-12 minutes until caramelized and golden brown. Remove the onions from the pan with a slotted spoon and set them aside. Keeping the drippings in the pan.
Season the chicken with the spices and add to the pan with the onion drippings. Sear for a few minutes or until there is a golden brown crust on the outside. The chicken does not need to be cooked through fully.
Add back in the onions, canned soup, water, and vinegar and simmer for a few minutes to thicken the sauce.
Pour the mixture into a greased medium-sized casserole dish and top with the mozzarella cheese. Bake at 350℉ for 25-30 minutes, or until the chicken is all the way cooked through. You can check this by taking the internal temperature with a meat thermometer. Once the chicken has reached 165℉ it is done! Serve with the carb of your choice and enjoy!
- You might be surprised that canned French onion soup exists! Most major canned soup brands sell it. If you’re in a pinch you could use prepared onion soup mix, but it won’t be as rich and delicious.
- You can double this recipe and bake it in two casserole dishes. I like to bake one in a disposable pan and bring it to a neighbor. Then they don’t have to return any dishes!
- Serve this dish over cooked rice, mashed potatoes, egg noodles, or cauliflower rice if you’re trying to keep carbs low.