Creamy and Easy Leftover Turkey Casserole With Mashed Potatoes

After the Thanksgiving feast ends and your fridge is overflowing with delicious leftovers, one question always comes up: What can I do with all this turkey and mashed potatoes? The answer is simple, comforting, and absolutely delicious—Leftover Turkey Casserole. This easy and hearty dish transforms your holiday extras into a one-pan wonder that the whole family will love.

Instead of reheating plate after plate of the same meal, repurpose your leftovers into something exciting and cozy. This Turkey and Mashed Potato Casserole combines layers of tender turkey, creamy mashed potatoes, flavorful stuffing, and melted cheese into the ultimate comfort food. Whether you’re planning a weekend dinner or looking for ways to make Thanksgiving last just a bit longer, this casserole is one of the best Thanksgiving Leftover Turkey Recipes you’ll ever make.

Let’s walk through why this is the go-to recipe for the days after your holiday feast.

Why This Easy Leftover Turkey Casserole is a Post-Holiday Favorite

There are plenty of recipes using leftover turkey and mashed potatoes, but this one stands out for a few reasons. First, it’s incredibly simple—you’ll need less than 10 ingredients, and everything is likely already in your fridge. Second, it’s a complete meal in one dish: protein, carbs, veggies, and cheese. Finally, it’s quick, satisfying, and reheats like a dream.

This leftover turkey casserole also lets you enjoy your holiday flavors in a whole new way. The textures—fluffy mashed potatoes, savory stuffing, juicy turkey, and melty cheese—blend into a creamy, golden-topped casserole that’s comfort in every bite.

Whether you’re feeding a crowd, preparing meals for the week, or just looking for a cozy family dinner, this recipe checks all the boxes.

Who This Turkey and Mashed Potato Casserole is For

Leftover Turkey Casserole is perfect for:

• Home cooks looking for easy turkey casserole with mashed potatoes
• Families with leftover Thanksgiving staples
• Anyone who enjoys classic, creamy, oven-baked comfort food
• Meal preppers searching for post-holiday freezer meals
• People who hate food waste and want delicious solutions for leftovers

If you’re a fan of Thanksgiving Leftover Turkey Recipes, this casserole is the no-brainer way to get dinner on the table with minimal effort.

Ingredients for Leftover Turkey Casserole

Here’s everything you need to make this comforting and delicious leftover turkey casserole:

• 3 cups cooked turkey, shredded or diced
• 2 cups prepared stuffing (leftover or store-bought)
• 2 cups mashed potatoes
• 1 cup frozen mixed vegetables (peas, carrots, corn)
• 1 can cream of chicken soup (or cream of mushroom for variation)
• 1/2 cup sour cream
• 1/2 cup milk
• 1 cup shredded cheddar cheese, divided
• Salt and black pepper, to taste
• Optional: chopped parsley for garnish

This combination of leftovers and pantry staples delivers maximum flavor with very little work. It’s also easy to customize—more on that below.

Kitchen Tools You’ll Need

To whip up this turkey and mashed potato casserole, you’ll need the following kitchen tools:

• 9×13-inch baking dish
• Mixing bowls
• Spoon or spatula
• Cheese grater (if shredding your own cheese)
• Measuring cups and spoons
• Aluminum foil (optional for baking)

With basic equipment and ingredients, this recipe is perfect for beginner cooks and busy weeknights.

How to Make Leftover Turkey Casserole (Step-by-Step)

Making this easy turkey casserole with mashed potatoes is quick and foolproof. Here’s how to do it:

Step 1: Preheat and Prep

Preheat your oven to 375°F (190°C). Lightly grease your 9×13-inch baking dish.

Step 2: Mix the Filling

In a large bowl, combine the shredded turkey, frozen mixed vegetables, cream of chicken soup, sour cream, milk, and half of the shredded cheese. Stir until everything is well mixed. Season with salt and pepper to taste.

Step 3: Layer the Casserole

Spread the stuffing evenly across the bottom of the baking dish. Then, spoon the turkey mixture over the stuffing, spreading it evenly. Finally, dollop the mashed potatoes over the top and gently smooth them out with a spoon or spatula.

Step 4: Add Cheese

Sprinkle the remaining shredded cheese on top of the mashed potato layer.

Step 5: Bake

Cover the dish with foil and bake for 25 minutes. Then, remove the foil and bake for another 10–15 minutes, or until the cheese is melted and bubbling.

Step 6: Serve

Let the casserole cool slightly before serving. Garnish with fresh parsley if desired.

In under an hour, you’ll have a delicious, all-in-one meal that brings new life to your Thanksgiving leftovers.

Tips for the Best Recipes Using Leftover Turkey and Mashed Potatoes

To get the most out of this leftover turkey casserole, keep these helpful tips in mind:

• Shred or chop the turkey evenly for consistent texture
• Thin out thicker mashed potatoes with a splash of milk
• Don’t skip the sour cream—it adds tang and creaminess
• Add a crunchy topping (like breadcrumbs or fried onions) for texture
• Taste and season as you go, especially if your leftovers were heavily seasoned

With a few adjustments, this dish can be made richer, lighter, creamier, or more indulgent depending on your taste.

Common Mistakes to Avoid in Thanksgiving Leftover Turkey Recipes

Even though this casserole is easy to prepare, a few missteps can affect the outcome:

• Using dry turkey: Make sure to mix it into the creamy filling to keep it moist
• Skipping the cheese: It helps bind the top and adds flavor—don’t omit it
• Using watery mashed potatoes: Too much liquid can make the casserole runny
• Under-seasoning: Taste everything before baking—leftovers lose flavor in the fridge

Avoid these mistakes, and your turkey and mashed potato casserole will be a holiday hit even after the holiday ends.

Make-Ahead and Freezing Instructions

Want to plan ahead? This casserole is ideal for meal prep:

• Make Ahead: Assemble the entire casserole up to 2 days in advance. Cover and refrigerate. Bake when ready.
• Freeze Before Baking: Assemble, cover tightly with foil and plastic wrap, and freeze for up to 2 months.
• To Reheat: Bake from frozen at 350°F (175°C) for 60–70 minutes, or thaw overnight and bake for 35–40 minutes.

Perfect for enjoying holiday flavors well into December.

Variations and Swaps for Leftover Turkey Casserole

This recipe is flexible and easy to customize. Try one of these tasty twists:

• Use sweet potatoes instead of mashed white potatoes
• Swap turkey for shredded chicken or Slow Cooked Drumsticks
• Add sautéed mushrooms or onions to the filling
• Mix in gravy or cranberry sauce for an extra holiday twist
• Top with Cheddar Jalapeño Cornbread Waffles instead of mashed potatoes

With these adjustments, your casserole will never get boring—even if the leftovers do!

What to Serve with Turkey and Mashed Potato Casserole

Even though this casserole is a full meal on its own, it pairs well with:

• A simple green salad
• Roasted vegetables or Roasted Sweet Potato Rounds
• Cranberry Apple Crisp for dessert
• A side of Garlic Herb Mashed Potatoes if you have extra!

These sides turn your post-holiday leftovers into a fresh, full dinner experience.

Storing and Reheating Leftovers

Once baked, this leftover turkey casserole stores beautifully:

• Refrigerate leftovers in an airtight container for up to 4 days
• Freeze baked casserole in individual portions for up to 2 months
• Reheat in the microwave or oven at 350°F until warmed through

It’s perfect for packing work lunches or quick weeknight dinners.

FAQs About Leftover Turkey Casserole

Can I use other vegetables in the filling?
Yes! Use green beans, spinach, broccoli, or anything you have on hand.

Can I make this dairy-free?
Substitute dairy-free cheese, plant-based milk, and vegan sour cream or yogurt.

Can I use gravy instead of soup?
Absolutely. Replace cream soup with leftover gravy for extra flavor.

What type of stuffing works best?
Any leftover stuffing works—cornbread, herb, sausage—it all adds texture and taste.

Can I double the recipe?
Yes, just use a larger baking dish or two 9×13 pans. It’s great for feeding a crowd.

Final Thoughts + Share and Subscribe CTA

This Leftover Turkey Casserole is proof that Thanksgiving flavors don’t have to end after the holiday. It’s a rich, creamy, satisfying way to repurpose those fridge staples into a meal that feels brand new. Whether you’re craving comfort food or just need an easy dinner solution, this easy turkey casserole with mashed potatoes delivers every time.

Enjoyed this recipe? Be sure to share it with friends and family and subscribe to our blog for more cozy comfort food ideas and Thanksgiving leftover turkey recipes that make every bite count.

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