Creamy Chicken Casserole with mushrooms is a treasure of a recipe. It’s popularly called “Chicken Gloria” and it will win you over. This chicken bake is the perfect party dish and is a reader favorite.

This post may contain affiliate links. Read my disclosure policy.
We love easy chicken casserole recipes like Chicken Tetrazzini and One-Pot Chicken and Rice. This Chicken and Mushroom Casserole does not disappoint!
Chicken Casserole Video
I hope you are inspired to try this chicken casserole for yourself! P.S. If you haven’t already, please subscribe to our YouTube Cooking Channel.
Why we love this Chicken Bake
Crowd-Pleaser! Galina (my sister’s mama-in-law) is an amazing cook and this is her chicken and mushroom casserole. It is always a hit at parties and church potlucks. We make this often.
The chicken is incredibly tender – you will savor every morsel. I’ve seen sorta-somewhat similar recipes online referred to as Chicken Gloria, but I love that this one is made from scratch. It uses simple, non-canned ingredients (no cream of chicken soup needed).
Reheats Well – This chicken and mushroom casserole also re-heats really well (if you are lucky enough to have leftovers). You will likely add this recipe to your list of favorites.
Ingredients for Chicken Casserole
The ingredients for this recipe are surprisingly simple but they just work (see full printable ingredient list below):
- Chicken breast (or chicken tenders)
- Chicken broth
- Half and half*
- All-purpose flour (or use a GF substitute)
- Mushrooms
- Onion – it disappears into the sauce
- Garlic – don’t skip it
- Lemon juice – fresh is best
*What is half and half? Half and half is basically light cream. If you aren’t able to find “half and half” at your grocery store, you can substitute with equal parts of milk and heavy cream.

Can I Substitute the Mushrooms?
You can replace white mushrooms with portabello mushrooms. If you don’t like mushrooms, you can substitute with different vegetables, just pick sturdy veggies (avoid zucchini which turns mushy). Here are some great options to replace mushrooms:
- Frozen peas
- Asparagus
- Caramelized onions
- Artichoke hearts (well-drained)
How to Make Chicken Casserole
1. Sautee Chicken: Season chicken with salt and pepper and dredge in flour. Heat 3 Tbsp oil in a large skillet over medium/high heat. Once the oil is hot, add chicken and saute until golden, and transfer to a 13×9 casserole baking dish.

Pro Tip: Work in batches if needed so you don’t crowd your pan. Don’t worry about cooking the chicken through; it still needs to go in the oven
2. Sautee Mushrooms: Add 3 Tbsp oil along and saute mushrooms and onions until soft and golden. Add garlic and saute another 1-2 min. Spread mixture over the chicken.

3. Make the Sauce: In a medium saucepan (or in the same pan you’ve been using), melt 3 Tbsp butter. Whisk in 3 Tbsp flour until lightly golden (1-2 min). Add 1 1/2 cups chicken broth, 1 Tbsp lemon juice, 1/4 tsp pepper, and whisk until smooth. Add 1 cup half & half and bring to a simmer. Season with salt and pepper to taste.

4. Combine and Bake: Pour sauce over the chicken casserole. Cover with foil and bake chicken and mushroom casserole at 350˚F for 45 minutes. Garnish with parsley if desired.

Serve with
This chicken bakes in gravy so it is great served over Creamy Mashed Potatoes or Egg noodles (the same way we serve Beef Stroganoff). It’s also great paired with these fresh sides:
Common Questions
You can use trimmed chicken thighs or chicken tenders instead. If using chicken tenders, you don’t need to slice them.
Make and combine the chicken and mushrooms and refrigerate. The next day, make the sauce, assemble, and bake as directed.
Yes, you can reheat a pre-baked and chilled chicken casserole in the oven: cover with foil and bake at 325˚f for about 20 minutes or just until hot, or reheat on the stovetop over low heat just until hot, stirring occasionally.
Yes! You can freeze leftover chicken casserole. One of my readers shared her method: “It works! I took the pan out of the freezer, left it in the fridge most of the day, and reheated it in a 350* oven for about 40 minutes.”
One of our readers reported great results using a multi-cooker/ slow cooker: brown the chicken in the bottom of the slow cooker using the sautee function and remove. Sautée onions and mushrooms then return chicken to the pan. Combine sauce ingredients in a pan on the stove, pour it over the chicken, and slow-cook on low for five hours.

More Casserole Recipes:
Casseroles are perfect for parties and gatherings because they are easy to make and easy to scale up. These casserole recipes always get rave reviews:
- Lasagna – arguably the “ultimate” casserole
- Stuffed Shells – so easy with a 3 cheese filling
- Loaded Mashed Potato Casserole – creamy, cheesy, delicious!
- Green Bean Casserole – elegant and made from scratch
- Sweet Potato Casserole – with crunchy pecan topping
- Baked Tilapia Casserole – topped with veggies
Chicken Casserole Recipe (Chicken Gloria)

Ingredients
Ingredients for Chicken and Mushroom Casserole:
- 2 1/2 lbs chicken breasts , (4 to 5 large), cut into 1 -inch thick strips
- 1 1/2 tsp sea salt , plus more to taste
- 1/4 tsp black pepper, plus more to taste
- 1 cup all-purpose flour , to coat the chicken
- 6 Tbsp olive oil, divided
- 1 lb white mushrooms, thickly sliced
- 1 medium onion, finely diced
- 3 garlic cloves, minced
Ingredients for the Sauce:
- 3 Tbsp unsalted butter
- 3 Tbsp all-purpose flour, for the sauce
- 1 1/2 cups chicken broth
- 1 Tbsp lemon juice
- 1 cup half and half, or 1/2 cup milk + 1/2 cup heavy cream
Instructions
- Season chicken with salt and pepper and dredge both sides in flour. Heat 3 Tbsp oil in a large skillet over medium/high heat. Once oil is hot, add chicken and saute until golden. Work in batches if needed so you don't crowd your pan. Don't worry about cooking the chicken through; it still needs to go in the oven. Transfer chicken to a 13×9 casserole baking dish.
- Scrape of any debris from the skillet. Add 3 Tbsp oil along with sliced mushrooms and diced onions and saute until soft and golden. Add garlic and saute another 1-2 min. Spread mixture over the chicken.
- In a medium saucepan (or in the same pan you’ve been using), melt 3 Tbsp butter. Whisk in 3 Tbsp flour until lightly golden (1-2 min).
- Add 1 1/2 cups chicken broth, 1 Tbsp lemon juice, 1/4 tsp pepper, and whisk until smooth. Add 1 cup half & half and bring to a simmer. Season generously with salt and pepper to taste.
- Pour sauce over the chicken and mushrooms. Cover with foil and bake at 350˚F for 45 minutes. Serve warm or hot over mashed potatoes, pasta or rice.
Very simple to make, added some extra spices for personal taste. Absolutely delicious 😋 Will definitely make again!!
Hi Robin! Wonderful. I’m glad you loved it.
Hi Robin – what extra spices did you add ? I’m cheating ! Using a can of creamy chicken and mushroom soup, chicken, mushrooms and possibly some bacon ! But hink it needs a bid of a “kick” ?
Hi there, What would be a good substitute for the heavy cream? Could I use cream of chicken soup instead?
Hi Krissy, We intended this recipe to be simple and used non-canned ingredients (no cream of chicken soup needed). I havne’t tried this with cream of chicken in place of heavy cream so I can’t advise on the outcome, but if you experiment, let me know how you liked the recipe.
Hi Natasha- Will make this tomorrow night! I am going to add my pasta to this as it bakes! Love all your recipes! The Blueberry muffins are a big hit at my house!
Hi Judi! I’m glad you love my recipes. Thank you!
Love this recipe! Made it several times and tried it with pork tenderloin .. just cut them in strips. Next I trying round steak tenderized and use beef broth. ..
This recipe is our favorite. Thanks for sharing.
You’re welcome, Jill! So glad you loved it. I bet it tastes amazing with pork and the beef sounds delicious!
So delicious. The flavor was amazing and the chicken was so tender. Definitely will make this again!
Thank you, Erin! So glad you loved the recipe.
Delicious as usual Natasha. I’ve made at least a half dozen different dishes from this website and every one of them has been soooo yummy. Thanks for the great recipes.
Hi Dan! I’m so glad you love my recipes. Thanks so much for the feedback.
Used veg stock instead of chicken broth also mixed cooked pasta in for the last 10 mins of oven cooking.
Hi Natasha, instead of sautéing the chicken can I bake the tenders in the oven?
Hi Sanda, we prefer it pan-fried, but it may work to bake it. If you experiment, let me know how you liked the recipe.
Hi Natasha,
Can I serve this dish with bread or dinner roll? If yes, what type of bread would you recommend?
Thanks!
Hi Adeline! I think dinner rolls would be great!
Thank you Natasha. This is a simple yet delicious recipe, exactly what I was looking for. The best I’ve tased. We love it.
You’re welcome, we’re glad you love it!
Thank you so much for recipe! Do you think you can do it with Costco rotisserie chicken? And how would you do it? Thank you so much
Hi Tanya! I think you could but I have never tested this to advise.
Tried this recipe for the 1st time and it was a big hit! (caught my mother in-law, licking her plate!).
I followed the directions to a ‘T’ and it came out great! Awesome flavor, perfect consistency.
As I was cleaning up, I couldn’t help thinking, it was missing something. Then it hit me, next time I make it I’m going to add a tablespoon, or so, of Dijon mustard to the sauce!?! I think it might take this dish to another level.
I’m so happy to hear that! Thanks so much for sharing, we appreciate your comments and feedback, Scott!
Would brussel sprouts be a good substitute for mushrooms? Debating if I should omit the mushrooms overall or add in the brussel sprouts…
Hi Tanya, I haven’t tried adding Brussel sprouts to this, but I bet that could work. If you experiment, let me know how you liked the recipe.
I made this last night and it was so delicious. My husband went back for thirds! I used extra creamy oat milk and plant-based butter and it still turned out wonderful! Thank you!
That’s wonderful, Rhonda! I’m so glad it was enjoyed. Thank you for the review.
I love your recipes Natasha. However, my family is gluten free. Can you offer a substitute for flour? Would cornstarch work & if so…how?
Hi Dee, I have not tried a gluten-free substitution but you may check the other comments below or maybe someone here can share if they have tried it!
If I want to use the frozen peas, at what point do I add to the chicken or the sauce, and should I add them frozen? Thank you!!!
Hi Leslie. You could add them in step 2 with the mushrooms.
Hi, I’m in the UK and I used about 2 teaspoons of cornflour (cornstarch in the US?) instead of flour and it was lovely.
The cornflour above was in the sauce. I did not coat the chicken in any flour.
I will try this. Thanks so much for your reply. It can be a struggle to be gluten free so any tips are appreciated.
I have made this a number of times and it is always a big hit with everyone. Love your recipes
So glad to hear that, Connie! Thank you for the review.
Hi can I make this up to where it goes in the oven ahead of time and then leave for a bit and come back to it and cook it a bit later?
Hi Abby, this recipe can be made ahead; we have notes under the common questions section: “Can I Make this ahead? Make and combine the chicken and mushrooms and refrigerate. The next day, make the sauce, assemble, and bake as directed.” I hope this helps!
Loved this recipe! I Used just under 2 lbs of boneless skinless chicken thighs because that’s what I had on hand and added fresh raw broccoli to the bottom of the casserole before putting it in the oven with the chicken to take up some space because I skimped a little on the chicken and to add some green 🙂 other then that I followed the rest of the recipe to a T, threw that all in the oven and it turned out SO DELICIOUS. I served it with rice and my husband ate HALF the casserole in one sitting 😂 the gravy that manifests by the time this dish is ready is absolutely heavenly on some rice. I’ll definitely be making this again!
I’m so happy you enjoyed that. Thank you for sharing that great review with us, Laura!
Natasha,
I want to make this with a potato dish that needs a 400 degree oven for 40 minutes. Do you think it would be ok to bake at higher temperature?
Hi Renee, I have not tested it at a higher temperature. I worry it would get overdone. IF you experiment, please let us know how that worked for you.
I just had to use a 400 degree oven. I baked it for about 25 mins and it came out fine (I used chicken tenderloins today). It’s a family favorite and it came out well once again!
Great to hear that it turned out great!
I made this tonight but it didn’t turn out to good. Kind of a watery mess. I followed the recipe amounts but seemed like way to much liquid as I was preparing it. I’ll try it again another day.☹️