Give your cherished holiday leftovers a magnificent second life with this incredible Thanksgiving Leftover Casserole, crowned with a fluffy Mashed Potato Topping. Imagine the comforting essence of a classic turkey pot pie, reimagined with a hearty stuffing crust, beautifully blended with the irresistible layers of a shepherd’s pie. This dish is not just a meal; it’s a delightful experience, transforming your post-holiday spread into something even more exciting and utterly delicious.
What Makes This Thanksgiving Leftover Casserole So Irresistible?
The Thanksgiving Leftover Casserole is your ultimate answer to making the most of your holiday bounty. It cleverly combines all the best elements of your Thanksgiving feast into one harmonious, deeply satisfying dish. Picture this culinary masterpiece: a robust crust crafted from savory leftover stuffing, a rich and juicy filling of tender turkey bathed in luscious gravy, all topped with a generous layer of creamy, buttery mashed potatoes. This isn’t just a simple use of leftovers; it’s a culinary transformation.
The magic truly happens with each distinct layer. The stuffing crust, pressed firmly into place and lightly baked, achieves a wonderful crispness that provides a sturdy, flavorful foundation for the entire casserole. This innovative crust not only holds the dish together but also infuses it with those beloved herby, savory notes that are quintessential to Thanksgiving. Above this, the tender, shredded turkey mingles with the rich, aromatic gravy, creating a moist and flavorful core that’s utterly comforting.
To balance the richness, a vibrant medley of leftover vegetables is added, providing a pleasant textural contrast and a fresh burst of flavor. Finally, the crowning glory: a thick, creamy blanket of mashed potatoes. As it bakes, the mashed potatoes develop a slightly golden, crispy exterior while remaining incredibly soft and buttery underneath. The combination of textures – crispy, tender, creamy – and the harmonious blend of savory flavors make every forkful a delightful experience. It’s the ultimate comfort food, reminding you of the holiday feast but in an exciting new format.
Planning Tip: If you’re still in the pre-Thanksgiving stage, don’t miss my comprehensive no-stress guide to planning and prepping a turkey dinner. Many elements, like gravy and stuffing, can be prepared ahead, making this leftover casserole even easier to whip up!
Gather Your Essential Leftovers for This Feast
Creating this magnificent casserole is all about utilizing those wonderful Thanksgiving extras. Each ingredient plays a vital role in building flavor and texture:
- Leftover Stuffing (2 cups): This forms the unique and incredibly flavorful crust. The stuffing, whether savory, herbed, or fruit-infused, brings incredible depth and a delightful crispness when baked. Our favorite is this herbed Apple Stuffing for Turkey.
- Egg (1, optional): A single beaten egg can be mixed into drier stuffing to help bind it more securely, ensuring your crust stays intact and sturdy.
- Leftover Turkey (2 cups, shredded or diced): The star protein of the casserole. Use a mix of white and dark meat for optimal flavor. Its tender texture and savory taste are central to the dish. (If you’re starting from scratch, here’s my easy way to cook a turkey).
- Leftover Gravy (1 cup): Absolutely essential for moisture and binding the turkey, infusing the entire filling with rich, savory goodness. Don’t skimp on the gravy! See my top recipes: Turkey Giblet Gravy Without Drippings and Make-Ahead Turkey Gravy.
- Leftover Vegetables (2 cups): This is where you can truly customize. Anything from glazed carrots (as pictured), sweet corn, green bean casserole, or my beloved crispy roasted Brussels sprouts with bacon works wonderfully. They add essential nutrients, vibrant color, and a fresh bite that cuts through the richness.
- Leftover Mashed Potatoes (4 cups): The ultimate creamy, fluffy topping. They provide a comforting finish and a beautiful golden crust when baked.
- Butter (4 tsp): Dotted over the mashed potato topping, butter ensures a beautiful golden-brown finish and adds an extra layer of richness and flavor.
Creative Variations and Smart Substitutions
Don’t have every leftover? No problem! This casserole is incredibly adaptable. Here are some ideas to make it your own:
- Cranberry Sauce Layer: For a delightful tart counterpoint, spread a thin layer of leftover cranberry sauce (whole berry or jellied) over the turkey and gravy filling before adding the vegetables. It adds a surprising and delicious zing.
- Sweet Potato Topping: If you have leftover sweet potato casserole or plain mashed sweet potatoes, use them instead of traditional mashed potatoes for a different, slightly sweeter flavor profile and a vibrant color.
- Cheese Addition: Elevate the gooey factor by sprinkling a layer of shredded cheddar, Monterey Jack, or a blend of cheeses between the turkey and vegetable layers, or even on top of the mashed potatoes during the last 10-15 minutes of baking for a bubbly, cheesy crust.
- Different Vegetables: If your Thanksgiving vegetable stash is low, feel free to use thawed frozen vegetables like peas, corn, or a mixed vegetable medley. Just ensure they are drained well before adding.
- Cream of Mushroom Soup: For an even creamier, richer filling, consider stirring in a can of cream of mushroom soup with the turkey and gravy.
Crafting Your Thanksgiving Leftover Casserole: Easy Step-by-Step Directions
Transforming your holiday leftovers into this comforting casserole is straightforward. Follow these simple steps for a truly rewarding dish:
Preparing the Signature Stuffing Crust
- Preheat Oven: Begin by preheating your oven to 375°F (190°C). This ensures the oven is at the correct temperature for even baking from the start.
- Moisten Stuffing: If your leftover stuffing seems a bit dry or crumbly, lightly moisten it with a tablespoon or two of turkey or chicken broth, or even a splash of water. This helps it become more pliable. If using the optional egg, beat it lightly and mix it thoroughly into the stuffing to help bind the crust for extra stability.
- Form Stuffing Crust: Firmly press the moistened stuffing mixture into the bottom and up the sides of a 9-inch pie dish or an 8×8 inch baking dish. Ensure it’s an even layer to create a consistent, sturdy base. This crust will become delightfully crispy.
- Pre-Bake Crust: Place the pie dish with the stuffing crust into the preheated oven and bake for 10 minutes. This crucial step firms up the stuffing, preventing it from becoming soggy once the wet filling is added, and starts to develop that irresistible golden crunch.
Assembling and Baking Your Casserole
- Combine Turkey and Gravy: While the crust is pre-baking, in a large mixing bowl, combine your shredded or diced leftover turkey with the gravy. Stir well to ensure the turkey is thoroughly coated and infused with flavor. This mixture will be wonderfully juicy and savory.
- Add Filling to Crust: Carefully spoon the turkey and gravy mixture into the pre-baked stuffing crust. Gently press it down with the back of a spoon to create an even layer and pack in all the delicious flavors.
- Layer Vegetables: Next, evenly spread your leftover vegetables (like cooked carrots, green beans, or Brussels sprouts) over the turkey filling. This layer adds color, essential nutrients, and a delightful textural element, acting as a delicious separator between the meat and potato topping.
- Prep Mashed Potato Topping: Spoon the leftover mashed potatoes evenly over the vegetable layer. You can spread them smoothly or create decorative peaks with a fork for extra texture. Dot the top generously with the specified amount of butter. As it bakes, the butter will melt, contributing to a beautiful golden-brown crust and an even richer flavor.
- Final Bake: Return the assembled casserole to the oven and bake for 30-40 minutes, or until the casserole is thoroughly heated through to an internal temperature of 165°F (74°C) and the mashed potatoes are golden and bubbly. If you notice the potato topping browning too quickly, loosely tent the casserole with aluminum foil to prevent over-browning.
Make-Ahead and Storage Tips for Your Leftover Casserole
This Thanksgiving Leftover Casserole is not only delicious but also remarkably convenient, perfect for prepping ahead or enjoying over several days. Here’s how to keep it fresh and flavorful:
- Make Ahead: You can assemble the entire casserole, up to the point of baking, a full day in advance. Cover it tightly with plastic wrap and store it in the refrigerator. When ready to bake, remove it from the fridge 30 minutes prior to baking to allow it to come closer to room temperature, then follow the baking instructions, adding an extra 10-15 minutes to the baking time if necessary.
- Refrigerate: Once the casserole is baked and has cooled completely, cover it tightly with foil or transfer individual portions to airtight containers. It will stay fresh and delicious in the refrigerator for up to 3 days.
- Freezing: This casserole freezes beautifully, either unbaked or fully baked.
- To Freeze Unbaked: Assemble the casserole in a freezer-safe dish (aluminum foil pans work great). Wrap it tightly with plastic wrap, then an additional layer of aluminum foil. Label with the date and freeze for up to 1 month. Thaw overnight in the refrigerator before baking as directed, adding about 15-20 minutes to the baking time.
- To Freeze Baked: Allow the baked casserole to cool completely. You can freeze it whole or divide it into individual portions. Wrap tightly as described above and freeze for up to 1 month. Thaw overnight in the refrigerator before reheating.
- Reheating:
- Oven: For best results, reheat the casserole in the oven at 350°F (175°C) until it is heated through and bubbling, reaching an internal temperature of 165°F (74°C). If reheating from refrigerated, this might take 20-30 minutes. If reheating from frozen (after thawing), it could take 45-60 minutes. Cover with foil to prevent drying out.
- Microwave: For quicker reheating of individual portions, the microwave works well. Place a serving on a microwave-safe plate, cover loosely, and heat for 2-4 minutes, stirring halfway, until hot. The crust may not be as crispy as when reheated in the oven, but it will still be delicious.
More Delicious Turkey Dinner Leftovers Recipes:
If you’re still brimming with holiday leftovers, don’t stop here! Explore these other fantastic recipes that transform your turkey day feast into new culinary delights:
- Turkey Poutine: Indulge in cheesy, golden french fry goodness, generously smothered in rich leftover gravy and topped with tender turkey. It’s an unexpectedly delicious treat!
- Leftover Turkey Stew with Mashed Potato Dumplings: A heartwarming and hearty stew that uses up turkey and vegetables, made extra comforting with fluffy mashed potato dumplings – pure bliss!
- Classic Turkey Pot Pie with Crust: A timeless classic for a reason. This easy recipe features a flaky pastry crust encasing a creamy, savory turkey and vegetable filling.
- What to Eat with Mashed Potatoes: Discover creative and inspiring ways to put those extra mashed potatoes to delicious use, beyond just reheating them.
More Fan-Favorite Thanksgiving Recipes (for next year’s feast or just because!):
- Easy Roast Turkey with Cranberry Chutney
- The Best Mashed Potatoes You’ll Ever Try
- Cornbread Casserole
- Apple Turkey Stuffing
- Candied Brussels Sprouts with Maple and Bacon
- Maple Five Spice Roasted Butternut Squash
- Super Easy Pumpkin Pie
- Green Bean Casserole with Crispy Onions
- Turkey Giblet Gravy Recipe (Without Drippings)
Rated 5 out of 5 stars (1 review)
Thanksgiving Leftover Casserole
Jennifer Pallian BSc, RD
5 minutes
45 minutes
8
Ingredients
For the Stuffing Crust:
- 2 cups leftover stuffing
- 1 egg optional, helps to bind the crust
For the Filling:
- 2 cups leftover turkey shredded or diced
- 1 cup leftover gravy
- 2 cups leftover vegetables cooked carrots, green beans, Brussels sprouts, etc.
For the Mashed Potato Topping:
- 4 cups leftover mashed potatoes
- 4 tsp butter
Instructions
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1. Preheat Oven: Preheat your oven to 375°F (190°C).
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2. Prepare Crust: If your stuffing is dry, moisten it with a bit of broth or water. Optionally, mix in one beaten egg to help bind it together more securely. Press the stuffing firmly into the bottom and up the sides of a pie dish to form a sturdy crust.
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3. Pre-Bake Crust: Place the pie dish with the stuffing crust in the preheated oven and bake for 10 minutes. This step is key to firming up the crust and preventing it from becoming soggy.
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4. Assemble Filling: In a large bowl, combine the shredded turkey and gravy. Stir until the turkey is well coated.
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5. Add Turkey Mixture and Vegetables: Spoon the turkey and gravy mixture into the pre-baked stuffing crust. Press down slightly to ensure the filling is evenly distributed. Add the leftover vegetables in an even layer on top of the turkey mixture.
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6. Prepare Mashed Potato Topping: Evenly spoon the mashed potatoes on top of the turkey and vegetable filling in the pie dish. Dot the surface generously with the butter.
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7. Final Bake: Place the casserole back in the oven and bake for 30-40 minutes, or until it is thoroughly heated through to 165ºF (74°C) and the mashed potatoes are golden and lightly crispy on top. If the mashed potatoes start to brown too much before the casserole is heated through, loosely tent the dish with aluminum foil.
Notes
For a more robust stuffing crust, especially if your stuffing is on the drier side, moistening it with a little extra broth or incorporating a beaten egg before pressing it into the dish will help it bind together beautifully and achieve a perfect texture.
Nutrition
Per Serving (approximate for 8 servings):
- Calories: 307 kcal
- Carbohydrates: 37g
- Protein: 17g
- Fat: 10g
- Saturated Fat: 3g
- Polyunsaturated Fat: 2g
- Monounsaturated Fat: 4g
- Trans Fat: 0.1g
- Cholesterol: 67mg
- Sodium: 469mg
- Potassium: 677mg
- Fiber: 6g
- Sugar: 2g
- Vitamin A: 2611IU
- Vitamin C: 26mg
- Calcium: 49mg
- Iron: 2mg
Nutrition information is automatically calculated and should be used as an approximation only. Actual values may vary based on ingredients used.
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