French Onion Chicken Casserole

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A simple and delicious recipe for French Onion Chicken Casserole - just 10 minute prep time and you have a delicious dinner recipe! { }

I really don’t like being a picky eater, but I am. Yes, it’s true… I can’t stand onions. They gross me out. BUT, having said that I actually like french fried onions… maybe because they’re breaded and fried makes them okay. Not sure just yet, but all I do know is that I can eat them (and LIKE them) without gagging like regular onions. 😉

This next recipe I’m sharing is topped off with those delicious french fried onions and filled with all sorts of goodness like chicken, cheese, sour cream, mayo and almonds. It is DELICIOUS!

The best thing about this French Onion Chicken Casserole is that it takes little prep time. Literally, it takes about 5 minutes to throw together if your chicken is already made. You can buy cooked, chopped chicken, but I like to bake my chicken earlier in the morning. I usually line a cookie sheet with foil, add some chicken breast and drizzle a little bit of olive oil and lemon pepper. I cook at 400 degrees for 35-45 minutes (depending on the thickness of the chicken breast). I let it cool and then chop it up real quick. Although it takes awhile to bake, it really only takes about 5 minutes of prep work. Add that with the 5 minutes it takes to put this casserole together and you’re looking at about 10 minutes of work.

Can’t beat that!

If you’re looking for another delicious and simple casserole to try out, be sure to give this one a try. 🙂

For video instructions on how to make this delicious casserole, watch the video below:


Here is the recipe for this French Onion Chicken Casserole:
4.6 from 13 reviews
French Onion Chicken Casserole
  • 3 cups Chopped cooked chicken
  • 1 cup chopped celery (or french style green beans)
  • 1 cup shredded cheddar cheese
  • 1 cup sour cream
  • 1 cup mayo
  • 1 can cream of chicken
  • ½ cup slivered almonds
  • 1 6 oz French's fried onions
  1. Preheat oven to 350 and coat a 9x13 baking dish
  2. In large bowl, stir celery, cheese, sour cream, mayo and cream of chicken. Add chicken and almonds. Spoon into dish.
  3. Bake uncovered for 30 minutes. Sprinkle fried onion and cook another 5 minutes. Let stand 5-10 minutes. Enjoy!

ous recipe for French Onion Chicken Casserole - just 10 minute prep time and you have a delicious dinner recipe! { }ous recipe for French Onion Chicken Casserole - just 10 minute prep time and you have a delicious dinner recipe! { }ous recipe for French Onion Chicken Casserole - just 10 minute prep time and you have a delicious dinner recipe! { }

We used celery for this recipe, but I think I’ll try French Style Green Beans when I make it next. I think even broccoli would be a great addition!

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A simple and delicious recipe for French Onion Chicken Casserole - just 10 minute prep time and you have a delicious dinner recipe!

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Kellyn Carpenter
Kellyn is a mom of 4 and loves to try and test out new recipes. She loves to find the best dinner and dessert recipes around and share them with those in the blogosphere.
Kellyn Carpenter

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  1. 1
  2. 2

    Kristyn, this looks SO good! Pinning and making for my family for sure!! I adore French Fried onions in savory dishes!
    Sara @ Bitz & Giggles recently posted..5 Reasons Why You Should Leave Your KidsMy Profile

  3. 3

    This looks amazing. Pinning it now.

  4. 4

    I made this recipe the other night. It was so good! Next time I think I’ll add some of the hash brown potatoes

  5. 5

    This is probably good, but I can’t see any reason for it; that is, there is nothing added but a lot of high fat, no-reason mayo, sour cream, french-fried onions, and a bit of celery. If it had VEGETABLES, and maybe either rice or noodles of some kind, it might be worthwhile, but as it stands here, I’d feel as if I was swallowing nothing but mayo and sour cream–both of which I like, in their places–without gaining one bit of real nutritional value.

    • 6

      Here’s a thought, maybe just scroll past it, without your condescending and rude comment! Good grief….

      • 7

        I agree! Joyce, no one is forcing you to make/eat this! I think it looks yummy! Not exactly heart-healthy, but we’re adults here and can decide for ourselves.

        • 8

          You can always take things out or add what you like. That’s whats great about recipes. If you know healthier substitutes, then add those and share what you tried. I’d love to know, so we can pass that along:)

          • 9

            I’m looking to make this as well! That does seem like a lot of mayo… if I take some out do you think it will be missed? And a good substitute for sour cream is plain greek yogurt! I use that on my taco/mexican dishes and you can NOT tell a difference.

          • 10

            You definitely don’t have to add as much! I don’t know if that will change anything, since I haven’t tried. And, yes, greek yogurt is a great substitute!! Let me know what you think!! Thanks a lot!

      • 11

        Agree. Can’t stand someone lingering with snide remarks when it isn’t necessary. Why did you come on here? Not every recipe is for everybody. No need to pretend you are superior and to be rude to the poster over the recipe and others who like it. I generally don’t make comments on Pinterest related sites, but the rudeness is provoking, but then maybe she wanted it that way???

    • 12

      I don’t usually comment, but this is by FAR the RUDEST most unwarranted comment I have EVER seen from a grown adult! If you “see no need for it” then don’t make it and move along!!! It’s one thing to comment saying you made it and weren’t pleased, or even comment offering up suggestions and changes, but to come here lecturing people with your want-to-be professional dietician opinions is ridiculous! If YOU don’t like it, don’t make it! But don’t think for a second that your snooty comment is going to prevent others from making it! Goodness, go find some happiness in your bitter life!

    • 14

      Totally agree.

  6. 15

    Tried this tonight and it was amazing! I added a few things to it. I put a layer of white rice on the bottom of the 9×13 pan. Then I added sauteed onions, carrots in addition to the celery. It was amazing!

    • 16

      Did you cook the rice first? If not, did you use instant rice? I love the idea of rice, I’m just not sure how to incorporate it. My chicken dishes always end up dry…

  7. 18

    For the French onion chicken casserole, do you mean the Durkee’s fried onions in the can?

  8. 20

    Kristyn, I have a question. Is your grandmother Luna’s first name Jean?

  9. 22

    This looks delicious – can’t wait to make it! When you listed ‘cream of chicken’ in the ingredient list do you mean a can of cream of chicken soup and if so do I add water or anything to it?

  10. 24

    Hi! This looks delicious. Do you know how many carbs per serving on it in? I’m on a low carb diet, but want to try this!! 🙂

  11. 25

    This was really good! I made it with a can of french-style green beans instead of the celery. My whole family liked it. Even my two little kids, ages 3 and 6, who don’t normally like regular green-bean casserole ate it. (They were hesitant at first but once they tried it, they cleaned their plates!) My 11yo has requested that I make it again for sure!
    No Reimer Reason recently posted..Music in Your HomeschoolMy Profile

  12. 27

    Just a hint for those who don’t like “real” onions. To keep the real onions and flavor, AND to please the picky eaters, I use a cheese grater to grate the onion into soups, stews, and casseroles.

  13. 29

    Came out fantastic…. but in order for it to be a “casserole” rather than “soup”…. cook it longer….

  14. 30

    I used French style green beans instead of the celery, and added mushrooms and penne pasta. It was a little dry. I think baking it covered would help or increase wet ingredients to 1 1/2 cups. Tasty.

    • 31

      Maybe the pasta soaked up all the wetness? I haven’t added pasta before, but it usually isn’t dry. I’m glad you think it’s tasty!! Thanks for sharing!

  15. 32

    Going to make this for a friend who lost her husband and I want her to be able to freeze it. If I do the first round of cooking and then add the onions part, will that work? Or will they burn when she heats it back up? Any suggestions most welcome. This looks like a good chix casserole but wanted to make something she could freeze in case she has too much food already. Thanks!

  16. 35

    I just made onion chicken casserole Sorry but it was to soupy and mayo was to over powering

    • 36

      Sorry it didn’t turn out quite how you thought. Haven’t had it come out soupy, so wondering what made it that way. If you like something other than mayo to substitute you could or maybe use a little less. Hope you’ll try it again 🙂

  17. 37

    My mother made this for my husband and I to eat after the birth of our son. She gave it to us frozen, cooked, with the onions to add to the top after we reheated it. We’ve eaten a million casseroles in the last month, and this is the winner!! It is incredible, we served with green beans on the side and I will make it again soon.

  18. 39

    Made this last night. I used green beans and celery. It was very good. Next time I think I will add hash browns too. Very good recipe as is!! Will definitely make it again!

  19. 41
    Rachel Stultz :

    I made this tonight with the following changes: added 1/4 cup chopped onion, replaced half the mayo with cheddar cheese soup (Campbell’s canned), added 1 tablespoon garlic powder, 1 tsp black pepper, and sprinkled a little cheddar over the top along with the French onions and used light versions of the sour cream and mayo. It ended up being 8 servings at 361 calories per serving. Definitely not a crazy calorie number for something like this. It was DELICIOUS!!!! Thank you for sharing this wonderful recipe! We’ll definitely make it again!

  20. 43

    OMG! This is to die for! So quick,easy & inexpensive. Great flavors & not too much leftover. Thank you for sharing.

  21. 45

    Anyone ever try this in the crockpot? I love recipes that I can through in in the morning and this seems like it would work. Just through everything in except thr onions until the last 30 minutes or so?

  22. 47

    This one is a keeper! Husband loved it! I don’t understand the comments from the folks who said theirs was soggy. Mine came out perfect. I’m going to stash some of these in the freezer, and add the onions at the end. BTW, I added some of the french fried onions into the actual casserole. Yum!

  23. 49
    Heather Mulligan-Gonzalez :

    I added bacon and bulked it up with 2 cups cooked pasta. It has become my family’s go to comfort food!

  24. 50
    Heather Mulligan-Gonzalez :

    I bulked this up with 2 cups cooked pasta and 8 strips thick cooked bacon, chopped up. It is my family’s go to comfort food!

  25. 52

    This was amazing! Made long grain rice and put this over the rice and it was fabulous! And super easy! 5🌟 In my book.

  26. 54

    I’ve made this twice now. The first time had too much mayo. I cut it in half and substituted more sour cream. Much better the second time! The men in my house really like it.

  27. 56

    What would you recommend serving with this? Sounds delicious.

  28. 62

    Thanks for the great dinner idea. To make it a little healthier I used 1 and 1/2 cup lite sour cream and 1/2 cup lite cream cheese instead of mayo. It still came out so creamy. This one’s a keeper, thanks!

  29. 64

    I have made this several times, each time tweaking it just a little for our family’s liking 🙂 The 1st time I followed the recipe exactly as is, it was very soupy! I am in weight watchers so I changed up a few things to make it a little healthier. The few changes I used were:
    green beans instead of celery (pure preference)
    Cut out the mayo completely (honestly couldn’t even tell)
    Used Greek yogurt in place of sour cream, dont use quite a full 1/2 cup

    So for whoever had negative comments, the way I made it was very healthy, contained chicken, Greek yogurt, green beans, cheese and 1 can of soup, most of which are healthy items 🙂

    Thank you Lil Luna for the great recipe!

  30. 66

    Making something new Especially such recipes it is really hard but I can do it. Thank you for Recipe

  31. 70

    This is the 3rd time making this. I substitute cream of mushroom for the mayo and use the French style green beans. Delicious!!

  32. 72

    Made this tonight and the entire pan was gone!!! I left out the celery cause my crew doesn’t care for it. I added 2 cups shredded zucchini well drained. My picky husband ate 3 helpings!!!! Will definitely make again!!! Thanks!!!

  33. 73

    Just made this for dinner tonight and it was very good. Made it with the French green beans instead of the celery, and since husband doesn’t like mayo baked in anything, I substituted it with a cup of Cambells nacho cheese soup. Also added some onion powder. It was a big hit and will be one recipe I’ll make again.

  34. 75

    Huge difference without the slivered almonds? I hardly ever buy those and hate them just sitting in the cabinet for the next recipe I use them with. Can’t wait to make this with the green beans!