Thanksgiving Casserole

Name: Thanksgiving Casserole
Prep time: 10 min
Cook time: 45 min
Ingredients: 1 family-size container mashed potatoes; 1 rotisserie chicken, shredded; 1 12 oz jar Heinz Chicken Gravy; 1 package cornbread stuffing mix; 1 cup chicken broth; 1 12 oz bag frozen green beans; 1 10.5 oz can cream of mushroom soup; 1 8 oz bag shredded mozzarella cheese; French fried onions, for topping

Thanksgiving leftovers energy without waiting for Thanksgiving is exactly what makes this casserole hit so hard.

Mashed potatoes create the creamy base, shredded rotisserie chicken brings the easy protein, and Heinz chicken gravy gets poured right over the top so every layer has that cozy holiday flavor. Cornbread stuffing soaked with chicken broth adds the classic Thanksgiving texture, while green beans and cream of mushroom soup bring in that green bean casserole feel.

Mozzarella melts over everything as it bakes, making the top creamy and cheesy before the French fried onions go on for the final crunchy finish. Every scoop has potatoes, chicken, gravy, stuffing, vegetables, cheese, and crispy onions all packed into one bite.

Great for an easy comfort food dinner, a holiday-style casserole, or a simple way to get all those Thanksgiving flavors in one 9×13 baking dish.

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Why You’ll Love This Recipe

Loaded with classic Thanksgiving flavors in one easy casserole.
Uses convenient ingredients like rotisserie chicken, prepared mashed potatoes, gravy, and stuffing mix.
Creamy, cheesy, savory, and crunchy all in the same bite.
Perfect for an easy holiday-style dinner without cooking a full turkey.
Great comfort food casserole for feeding a family.

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Ingredients

The casserole starts with a family-size container of mashed potatoes spread across the bottom of a baking dish. Shredded rotisserie chicken and Heinz chicken gravy are layered on top, then cornbread stuffing is hydrated with chicken broth before being spread over the gravy.

Frozen green beans, cream of mushroom soup, and shredded mozzarella cheese finish the casserole before it goes into the oven. Once it is hot and bubbly, French fried onions are added on top for a crispy final layer.

1 family-size container mashed potatoes
1 rotisserie chicken, shredded
1 (12 oz) jar Heinz Chicken Gravy
1 package cornbread stuffing mix
1 cup chicken broth
1 (12 oz) bag frozen green beans
1 (10.5 oz) can cream of mushroom soup
1 (8 oz) bag shredded mozzarella cheese
French fried onions, for topping

How To Make Thanksgiving Casserole

Step 1: Preheat Oven

Preheat your oven to 350°F.

Step 2: Add Mashed Potatoes

Spread the mashed potatoes evenly across the bottom of a 9x13-inch baking dish.

Step 3: Add Chicken

Top the mashed potatoes with the shredded rotisserie chicken.

Step 4: Add Gravy

Pour the chicken gravy evenly over the chicken.

Step 5: Hydrate Stuffing

In a bowl, combine the cornbread stuffing mix with the chicken broth and stir until the stuffing is hydrated.

Step 6: Add Stuffing Layer

Spread the hydrated stuffing evenly over the gravy layer.

Step 7: Add Green Beans

Add the frozen green beans in an even layer over the stuffing.

Step 8: Add Cream of Mushroom Soup

Spoon the cream of mushroom soup over the green beans and spread it out evenly.

Step 9: Add Mozzarella

Sprinkle the shredded mozzarella cheese evenly over the top.

Step 10: Bake

Bake for 45 minutes, until hot and bubbly.

Step 11: Add Fried Onions and Serve

Remove the casserole from the oven, top with French fried onions, and serve warm.

Recipe Variations

Use leftover Thanksgiving turkey instead of rotisserie chicken for a holiday leftovers version. It turns the casserole into an easy way to use up turkey, mashed potatoes, gravy, stuffing, and green beans in one dish.
Swap the mozzarella for cheddar cheese if you want a sharper cheesy flavor. Cheddar makes the casserole taste richer and pairs really well with the mashed potatoes and gravy.
Use cream of chicken soup instead of cream of mushroom if you want a more chicken-forward flavor. It keeps the casserole creamy while blending smoothly with the gravy and rotisserie chicken.
Add cranberry sauce on the side when serving for a sweeter Thanksgiving-style bite. Keeping it on the side lets people add as much or as little as they want.
Mix a little extra chicken broth into the stuffing if you like a softer stuffing layer. If you prefer a firmer stuffing texture, stick with the 1 cup called for in the recipe.

Tips for Success

Spread each layer evenly so every scoop gets mashed potatoes, chicken, gravy, stuffing, green beans, and cheese.
Hydrate the stuffing with chicken broth before adding it to the casserole so it bakes up tender instead of dry.
Use shredded rotisserie chicken to keep the prep fast and add more flavor than plain cooked chicken.
Bake the casserole uncovered so the cheese melts and the top gets hot and bubbly.
Add the French fried onions after baking so they stay crispy instead of softening too much in the oven.
Let the casserole sit for a few minutes before serving so the layers set slightly and scoop cleaner.

Frequently Asked Questions

Can I use leftover turkey instead of rotisserie chicken?

Yes, leftover turkey works great in this casserole and makes it even more Thanksgiving-style. Just shred or chop the cooked turkey before layering it over the mashed potatoes. The gravy, stuffing, green beans, and cream of mushroom soup will help keep it moist as it bakes.

Can I make Thanksgiving casserole ahead of time?

Yes, you can assemble most of the casserole ahead of time and keep it covered in the refrigerator until you are ready to bake. For the best texture, wait to add the French fried onions until after the casserole is baked. If baking from cold, you may need to add a few extra minutes to the cook time.

Do I need to thaw the frozen green beans first?

No, the frozen green beans can go straight into the casserole. They will heat through while the casserole bakes and soften into the creamy mushroom layer. If you prefer a less watery casserole, you can thaw and pat them dry first, but it is not required.

Can I use a different cheese?

Yes, mozzarella works well because it melts smoothly, but cheddar, Colby Jack, or Monterey Jack can also be used. Cheddar will give the casserole a stronger cheesy flavor, while mozzarella keeps it mild and creamy. Use whatever cheese fits the flavor you want.

How should I store leftovers?

Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat portions in the microwave or warm the casserole in the oven until heated through. The fried onions may soften after storing, so adding a few fresh ones on top before serving helps bring back the crunch.

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Thanksgiving Casserole

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A cozy Thanksgiving-style casserole made with mashed potatoes, shredded rotisserie chicken, Heinz chicken gravy, cornbread stuffing, green beans, cream of mushroom soup, mozzarella cheese, and French fried onions.

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Prep Time 10

Cook Time 45

Servings: 8 servings

Ingredients Method Video

Ingredients

1 family-size container mashed potatoes
1 rotisserie chicken, shredded
1 12 oz jar Heinz Chicken Gravy
1 package cornbread stuffing mix
1 cup chicken broth
1 12 oz bag frozen green beans
1 10.5 oz can cream of mushroom soup
1 8 oz bag shredded mozzarella cheese
French fried onions, for topping

Method

Preheat your oven to 350°F.
Spread the mashed potatoes evenly across the bottom of a 9x13-inch baking dish.
Top the mashed potatoes with the shredded rotisserie chicken.
Pour the chicken gravy evenly over the shredded chicken.
In a bowl, combine the cornbread stuffing mix with the chicken broth and stir until the stuffing is hydrated.
Spread the hydrated stuffing evenly over the gravy layer.
Add the frozen green beans in an even layer over the stuffing.
Spoon the cream of mushroom soup over the green beans and spread it out evenly.
Sprinkle the shredded mozzarella cheese evenly over the top.
Bake for 45 minutes, until the casserole is hot and bubbly.
Remove from the oven, top with French fried onions, and serve warm.

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Hey, I'm Scotty

What started as just messing around in the kitchen and posting recipes online quickly turned into something way bigger than I ever expected. At first, it was just a side hustle—sharing simple, easy meals that anyone could make without overthinking it.