Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (2024)

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Home » Recipe Index » Family Favorite Chicken Mashed Potato Casserole

by Kara Cook 12 Comments

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Chicken mashed potato casserole is a comforting dish the whole family will love. With a mashed potato base, creamy chicken and vegetable filling, and a topping of cheese and fried onions, it is packed with flavor!

Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (1)

This chicken casserole is one of my husband’s very favorite meals. My kids like it too, so we have it quite often.

Here’s why we love it:

  • That mashed potato shell. With cheddar cheese and french fried onions, it is yummy enough to eat on its own!
  • The chicken filling is so creamy, and has chunks of chicken and vegetables. As a mom, I love sneaking in veggies whenever I can.
  • It’s a great way to use leftover mashed potatoes, but you can use instant potatoes if you prefer.
  • The topping – oh boy. Ooey gooey cheese topped with crunchy fried onions. A perfect balance of textures, and it tastes so good!

I usually serve this casserole with either tossed green salad, or if my kids get their way, fruit salad. It’s a perfect dinner any night of the week, and it also makes great leftovers.

HOW TO MAKE CHICKEN MASHED POTATO CASSEROLE

  1. SHELL: Stir together the mashed potatoes, cheddar cheese, and fried onions. Spread into a greased 2 1/2 quart casserole dish, making a shell across the bottom and up the sides.
    Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (2)
  2. FILLING: Mix together the cooked chicken, vegetables, cream of chicken soup, milk, mustard, garlic powder, and pepper. Pour into the mashed potato shell.
    Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (3)
  3. BAKE: Bake at 375° for about 30 minutes or till hot.
    Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (4)
  4. TOPPING: Sprinkle 1/4 cup cheese and 1/4 cup fried onions over the top of the casserole and bake for 3-5 minutes, or till cheese melts and onions are golden brown. Make sure you watch closely so the onions don’t burn!

Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (5)

Can this dish be made ahead?

Yes, this recipe is perfect for meal prep. You can prep it one of two ways.

  1. Prepare the mashed potato mixture and the filling up to two days ahead. When you are ready to prepare the dish, heat them and assemble and bake as directed.
  2. Assemble the entire casserole ahead of time and store it in the refrigerator for up to two days. Since the dish is cold, you will need to increase the baking time.

How to store leftovers?

If you have any leftover chicken and mashed potatoes casserole, you can store it in the refrigerator for 3-4 days. You can either heat individual portions in the microwave, or cover with foil and reheat the entire casserole in the oven at 300 degrees.

Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (6)

MORE CASSEROLE RECIPES:

  • Chicken and Potatoes
  • Shepherd’s Pie with Ground Beef
  • Chili Casserole
  • Poppy Seed Chicken Casserole
  • Hamburger Green Bean Casserole
  • Chicken and Biscuit Casserole

CHICKEN AND MASHED POTATOES RECIPE

Yield: 6 servings

Chicken Mashed Potato Casserole

Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (7)

Hearty and comforting chicken and mashed potatoes topped with melted cheese and crunchy fried onions.

Prep Time15 minutes

Cook Time33 minutes

Total Time48 minutes

Ingredients

  • 3 cups hot mashed potatoes (you can use instant)
  • 1/2 cup grated cheddar cheese
  • 1/3 cup French’s fried onions
  • 3 cups cooked chicken breast, shredded or diced
  • 2 1/2 cups frozen vegetables (I usually use a bag of mixed veggies, or peas, carrots, and corn.)
  • 1 10.5 ounce can cream of chicken soup
  • 1/3 cup milk
  • 1/2 tsp mustard
  • 1/4 tsp garlic powder
  • 1/4 tsp pepper

Topping:

  • 1/4 cup grated cheddar cheese
  • 1/4 cup French’s fried onions

Instructions

  1. Stir together the mashed potatoes, 1/2 cup cheddar cheese, and 1/3 cup fried onions. Spread into a greased 2 1/2 quart casserole dish, making a shell across the bottom and up the sides.
  2. Mix together the cooked chicken, vegetables, cream of chicken soup, milk, mustard, garlic powder, and pepper. Pour into the mashed potato shell.
  3. Bake at 375° for about 30 minutes or till hot.
  4. Top with 1/4 cup cheese and 1/4 cup fried onions and bake for about 3 more minutes, or till cheese melts and onions are golden brown. (Watch closely, the onions burn easily.)

Notes

This recipe can be adapted to use more or less of the chicken and vegetables. If you have a bunch of carnivores living at your house, use more chicken and less veggies. If you have non meat lovers, do the opposite.

Nutrition Information:

Yield:

6

Serving Size:

1

Amount Per Serving:Calories: 432Total Fat: 17gSaturated Fat: 6gTrans Fat: 1gUnsaturated Fat: 9gCholesterol: 80mgSodium: 980mgCarbohydrates: 37gFiber: 5gSugar: 5gProtein: 31g

Did you make this recipe?

Leave a comment below and pin the recipe to Pinterest!

If you have leftover mashed potatoes, you really should give this casserole a try! Let me know how you like it. 🙂

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Reader Interactions

Comments

  1. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (8)Chrissy

    Delicious! Just found it typing in these ingredients and “recipe” since it’s a cold, rainy day, and comfort food seemed like the way to go. This did not disappoint. I had all of the ingredients on hand so I did not have to go out in the cold and rain. Thank you for this delcious recipe. I used instant potatos, hand grated cheese, cream of chicken with herbs soup for those items.

    Reply

  2. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (10)Becky

    So delicious!!! I’ll be keeping this recipe to make again! Thanks.

    Reply

    • Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (11)Kara Cook

      So happy you loved it, it’s one of my husband’s very favorite dinner recipes! 🙂

      Reply

  3. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (12)Joyce G

    THIS was very easy AND yummy!!! Will make it again. Having leftovers tonight, looking forward to it! Thank you for this recipe!

    Reply

    • Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (13)Kara Cook

      So happy to hear that you loved it! My husband and I sometimes have to fight over the leftovers. Haha.

      Reply

  4. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (14)Sharon Richmond

    Is the mustard powdered mustard or pre-made yellow mustard? What is recommended?

    Reply

    • Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (15)Kara Cook

      Just regular mustard in the yellow squeeze jar.

      Reply

  5. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (16)Melissa

    Yum – my family went crazy for this! So yummy and delicious!

    Reply

  6. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (17)Melissa

    I love topping this with the crispy fried onions- such a delicious recipe!

    Reply

    • Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (18)Kara Cook

      My family loves that part – so glad you did too!

      Reply

  7. Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (19)Rochelle

    Ok, I have to tell you that I found this recipe last week and I made it for my family and they loved it! My husband requested that I make it again soon and my 2 year old gobbled it right up. It’s going to be a keeper!

    Reply

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Hearty Chicken Mashed Potato Casserole Recipe - Creations by Kara (2024)

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