Creamy Leftover Turkey Casserole with Stuffing Topping Recipe

Leftover Turkey Casserole is everything good about the holiday plate baked into one dish: chunks of turkey, carrots, celery and mushrooms in a creamy sage and thyme sauce, finished with a crisp, buttery layer of leftover stuffing. The filling is rich and savory like the inside of a pot pie, the topping crunches like the corner piece of the stuffing pan, and every spoonful tastes like Thanksgiving without feeling like a repeat of the same plate.

Prep takes 15 minutes, the sauce and baking take 35, and the total is 50 minutes. It is an easy recipe, and the step worth slowing down for is the sauce: cook the flour for a full minute before adding the liquid, and let it simmer until it coats a spoon, so the casserole is creamy rather than soupy. Serve it the weekend after Thanksgiving, on a cold weeknight or for a relaxed family dinner.

What is Leftover Turkey Casserole?

This casserole is a way to use up two Thanksgiving leftovers at once: roast turkey and stuffing. The turkey goes into a creamy filling made from a butter and flour roux, broth and milk, cooked with onion, celery, carrots and mushrooms and seasoned with sage and thyme. Leftover stuffing is crumbled over the top, drizzled with butter and baked until crisp. The contrast between the soft, savory filling and the crunchy topping is what makes it so satisfying, and it has become a post-holiday favorite in American kitchens.

Reasons to Try Leftover Turkey Casserole

It uses up two of the biggest holiday leftovers in one comforting pan.

• Two leftovers, one dish — Turkey and stuffing both get a second life without tasting like reheated plates.
• Crisp stuffing crust — Buttered crumbles of stuffing bake into a crunchy, golden lid.
• Homemade cream sauce — A simple roux with broth and milk tastes far better than canned soup.
• Plenty of vegetables — Carrots, celery, mushrooms and peas make it a complete meal.
• Make-ahead friendly — Assemble it a day ahead and bake it when you need it.
• Comfort in under an hour — Fifty minutes from start to table, and most of that is hands-off baking.

Ingredients Needed to Make Leftover Turkey Casserole

Any style of stuffing works on top, from classic sage bread stuffing to cornbread dressing.

For the Filling

• Unsalted butter (3 tbsp) — Softens the vegetables and starts the roux.
• Yellow onion (1, diced) — Builds a sweet, savory base.
• Carrots (2, diced) — Add color and sweetness.
• Celery (2 stalks, diced) — Brings the classic Thanksgiving flavor.
• Cremini mushrooms (8 oz, sliced) — Deepen the savory flavor of the sauce.
• Garlic (2 cloves, minced) — Adds aroma.
• Cooked turkey (4 cups, chopped) — A mix of white and dark meat gives the best texture.
• Frozen peas (1 cup) — Stirred in at the end so they stay bright green.

For the Creamy Sauce

• All-purpose flour (1/4 cup) — Thickens the sauce.
• Low-sodium chicken or turkey broth (2 cups) — The savory backbone; homemade turkey stock is even better.
• Whole milk (1 cup) — Makes the sauce creamy; half-and-half makes it richer.
• Dried thyme (1 tsp) and dried sage (1/2 tsp) — Echo the herbs in the stuffing.
• Kosher salt (1 tsp) and black pepper (1/2 tsp) — Adjust after tasting, since stuffing and broth both carry salt.

For the Stuffing Topping

• Leftover stuffing (3 cups) — Crumbled into small pieces so it crisps evenly.
• Unsalted butter (2 tbsp, melted) — Helps the topping turn golden and crunchy.
• Broth (2 to 4 tbsp, optional) — Moistens very dry stuffing so it does not scorch.
• Fresh parsley (1 tbsp, chopped) — A fresh finish.

Equipment Needed

A large skillet and a medium baking dish handle the whole recipe.

• Large deep skillet — Cooks the vegetables and sauce in one pan.
• 3-quart baking dish — A 9×9-inch or 11×7-inch dish gives a thick filling and plenty of topping.
• Whisk — Keeps the sauce smooth as the liquid goes in.
• Wooden spoon — Stirs the vegetables and folds in the turkey.
• Instant-read thermometer — Confirms the center reaches 165°F (74°C), since both the turkey and stuffing are leftovers.

Instructions to Prepare Leftover Turkey Casserole

• Heat the oven — Heat the oven to 375°F (190°C) and butter a 3-quart baking dish.
• Cook the vegetables — Melt the butter in a large skillet over medium heat and cook the onion, carrots, celery and mushrooms for 7 to 8 minutes until softened. Add the garlic for 30 seconds.
• Make the sauce — Sprinkle in the flour and stir for 1 minute. Slowly whisk in the broth and milk, then simmer 3 to 4 minutes until the sauce coats a spoon. Season with the thyme, sage, salt and pepper.
• Add turkey and peas — Stir in the turkey and peas and pour the filling into the baking dish.
• Top with stuffing — Crumble the stuffing evenly over the filling, moistening it with a little broth if it is dry, and drizzle with the melted butter.
• Bake until crisp — Bake 25 minutes, until the filling bubbles, the topping is golden and crisp and the center reaches 165°F (74°C).
• Rest and serve — Let the casserole stand 5 minutes, sprinkle with parsley and serve.

What Goes Well With Leftover Turkey Casserole Recipe

The casserole is a full meal, so light sides work best.

• Cranberry sauce — A spoonful of tart cranberry brightens each rich bite.
• Roasted Brussels sprouts — Their crisp, slightly bitter edges balance the creamy filling.
• Simple green salad — Crunchy lettuce and a lemon vinaigrette keep things fresh.
• Dinner rolls — Warm rolls are perfect for mopping up the sauce.
• Hot spiced cider — Apple cider simmered with cinnamon keeps the holiday mood going.
• Pumpkin pie — Leftover pie is the obvious, and best, dessert.

Key Tips for Making Leftover Turkey Casserole Recipe

These steps keep the filling creamy and the topping crisp.

• Cook the flour — A full minute of stirring removes the raw flour taste from the sauce.
• Thicken before baking — Sauce should coat a spoon before it goes in the dish, or the casserole turns soupy.
• Crumble the stuffing small — Small pieces crisp all over, while big chunks stay soft underneath.
• Moisten dry stuffing — Several spoonfuls of broth keep very dry stuffing from scorching.
• Taste for salt — Leftover stuffing and broth can both be salty, so season the sauce at the end.
• Use leftovers promptly — Turkey and stuffing are best used within 3 to 4 days of the holiday meal.
• Let it rest — Five minutes out of the oven helps the sauce settle so servings hold their shape.

Creative Variations of Leftover Turkey Casserole Recipe

Swap the topping or the vegetables to match whatever leftovers you have.

• Mashed potato topping — Spread leftover mashed potatoes over the filling instead of stuffing for a shepherd’s pie style bake.
• Biscuit topping — Canned or homemade biscuits baked on top turn it into a pot pie casserole.
• Cheesy version — Stir 1 cup shredded Gruyère or cheddar into the sauce for extra richness.
• Green bean add-in — Leftover green beans or Brussels sprouts can replace the peas.
• Cornbread dressing top — Crumbled cornbread dressing gives a slightly sweet, Southern-style crust.
• Chicken casserole — Rotisserie chicken works in place of turkey any time of year.

Storage Guidelines for Leftover Turkey Casserole Recipe

This casserole keeps well, but plan around the age of your leftovers.

• Refrigerator — Leftover casserole keeps 3 to 4 days in an airtight container.
• Freezer — Freeze baked portions for up to 2 months; the topping softens but recrisps in the oven.
• Make ahead — Assemble the filling, cool it, cover and refrigerate up to 24 hours, adding the stuffing topping just before baking.
• Fresh leftovers only — Build the casserole with turkey and stuffing that are no more than 3 days old.

Reheating Tips for Leftover Turkey Casserole Recipe

The oven is best for keeping the stuffing topping crisp.

• Oven — Warm uncovered at 350°F (175°C) for 20 to 25 minutes, until the center reaches 165°F (74°C).
• Microwave — Heat single portions in 1-minute bursts until they reach 165°F (74°C); the topping will soften.
• Make-ahead bake — A chilled, assembled casserole needs 35 to 45 minutes at 375°F (190°C) to reach 165°F (74°C) in the center.

Nutrition Value (per serving)

Based on 1 serving out of 6 total servings.

• Calories — 470
• Protein — 38g
• Fat — 20g
• Saturated Fat — 9g
• Carbohydrates — 34g
• Fiber — 4g
• Sugar — 7g
• Sodium — 850mg
• Cholesterol — 105mg

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