Creamy Leftover Turkey Casserole (No Canned Soup)

Leftover turkey casserole turns the best part of the holidays into a warm, satisfying weeknight dinner. This one skips the canned soup and makes a quick creamy sauce from scratch with butter, flour, milk, and cheddar.

It comes together in one big skillet, then bakes under a crunchy panko topping until bubbly and golden. No one will complain about leftovers again.

Why This Casserole Works

The sauce starts with a simple roux and real cheese, so it tastes rich and homemade without any gloppy shortcuts. You get tender turkey, soft egg noodles, and a crisp breadcrumb lid in every scoop.

Frozen peas and sautéed mushrooms add color and a little texture, making it feel like a complete meal. Plus, you can build the whole thing ahead and bake it when you need it.

Ingredients

• 3 tbsp unsalted butter, divided: half for the sauce, half for the topping
• 1 small onion, diced: yellow or sweet onion works best
• 8 oz cremini mushrooms, sliced: white button mushrooms are fine too
• 2 garlic cloves, minced: fresh, not jarred, for the best aroma
• 3 tbsp all-purpose flour: this thickens the sauce
• 1 ½ cups low-sodium chicken broth: or turkey broth if you have it
• 1 ½ cups whole milk: warm slightly so it blends smoothly
• 2 cups shredded sharp cheddar cheese: grate it yourself; pre-shredded doesn’t melt as well
• 3 cups shredded or diced cooked turkey: cold from the fridge is fine
• 1 cup frozen peas: no need to thaw
• 8 oz egg noodles: cooked just shy of al dente
• ½ tsp salt: plus more to taste
• ¼ tsp black pepper
• ½ cup panko breadcrumbs: for that crunchy top

Variations

• Swap the protein: Leftover roast chicken works exactly the same way; use the same weight.
• Change the veggies: Sautéed spinach, leftover green beans, or a blend of frozen mixed vegetables all fit nicely. Just cook any raw vegetables first.
• Try a different cheese: Gruyère melts beautifully and adds a nutty note, or use smoked gouda for a deeper flavor.
• Make it dairy-free: Use plant-based butter, oat milk, and a good melting vegan cheddar shred.
• Go gluten-free: Use gluten-free flour blend and gluten-free pasta, or skip noodles entirely and serve over mashed potatoes.

Fudgy Banana Bread Brownies go beautifully with this casserole when you want something sweet.

How to Make Creamy Leftover Turkey Casserole

Step 1: Boil the Egg Noodles

Bring a large pot of salted water to a boil. Add the 8 oz of egg noodles and cook for 1 to 2 minutes less than the package directions, until just barely tender. Drain and set aside.

Look for noodles that still have a little chew at the center; they will finish cooking in the sauce later. Overcooking them now turns the whole casserole mushy.

Step 2: Sauté the Vegetables

While the noodles cook, melt 1 ½ tablespoons of the butter in a large oven-safe skillet or Dutch oven over medium heat. Add the diced onion and sliced mushrooms with a pinch of salt. Cook, stirring occasionally, for about 6 minutes, until the mushrooms release their liquid and start to brown.

The mushrooms should shrink by about half and the onions will turn soft and translucent. If they start to stick, lower the heat a touch and add a tiny splash of water.

Step 3: Whisk the Sauce

Stir the minced garlic into the skillet and cook for 30 seconds until fragrant. Sprinkle in the 3 tablespoons of flour and whisk constantly for 1 minute to cook out the raw flour taste. Slowly pour in the 1 ½ cups chicken broth while whisking, then add the 1 ½ cups milk. Bring to a gentle simmer, whisking often, and cook for 3 to 4 minutes until the sauce thickens enough to coat the back of a spoon.

Remove the skillet from the heat and stir in the shredded cheddar a handful at a time until fully melted and smooth. Taste and season with the ½ teaspoon salt and ¼ teaspoon pepper. Preheat your oven to 375°F (190°C) while the sauce comes together.

Step 4: Assemble the Casserole

Fold the drained noodles, shredded turkey, and frozen peas into the sauce until everything is evenly coated. Spread the mixture into an even layer right in the skillet, or transfer it to a greased 9×13 baking dish if your skillet isn’t ovenproof.

The filling will look loose at this point, but the noodles will absorb some liquid as it bakes. Don’t be tempted to drain off any extra sauce.

Step 5: Top and Bake

In a small bowl, mix the panko breadcrumbs with the remaining 1 ½ tablespoons melted butter. Scatter the buttered crumbs evenly over the top. Bake for 25 to 30 minutes, until the sauce bubbles around the edges and the topping is deep golden. If you want it extra crunchy, switch the broiler on for the last 1 to 2 minutes, watching closely.

Let the casserole rest for 5 minutes before scooping it onto plates or into shallow bowls. The sauce will set slightly, and each portion will hold together.

Tips for the Creamiest Casserole

• Use freshly grated cheese. Pre-shredded bags contain anti-caking agents that make the sauce grainy instead of silky.
• Undercook the noodles by a minute. They finish in the oven, so this keeps them from turning to mush.
• Let the casserole sit for at least 5 minutes after baking. It stays hot, and the sauce thickens just enough to serve neatly.
• Want extra crunch? Swap half the panko for crushed buttery crackers or fried onions.

Bake times by dish size and material:

Storing Leftover Casserole

• Refrigerate: Cool completely, cover tightly, and store for up to 4 days.
• Reheating: Warm individual portions in the microwave, or reheat the whole dish in a 350°F oven for 15-20 minutes with foil on top so the topping stays crisp.
• Serve Cold: Not recommended; the sauce tastes best warm.

What to Serve with Creamy Leftover Turkey Casserole

A crisp, lightly dressed salad cuts through the richness really well. I like arugula with lemon vinaigrette, or a simple romaine salad with shaved parmesan. Steamed green beans or roasted broccoli also work if you want something warm on the side.

Frequently Asked Questions

Can I use chicken instead of turkey?

Yes, any cooked shredded chicken, rotisserie chicken, or even leftover roast chicken works beautifully. Use the same 3 cups.

Can I make this ahead of time?

Absolutely. Assemble the casserole completely, cover, and refrigerate for up to 24 hours before baking. Add 5 to 10 minutes to the bake time since it will be cold from the fridge.

Can I freeze leftover turkey casserole?

You can freeze the assembled, unbaked casserole for up to 2 months. Thaw overnight in the fridge, then bake as directed, adding extra time as needed. The topping may soften slightly after freezing.

Can I use leftover gravy instead of making the sauce from scratch?

Yes, omit the flour, broth, and milk. Whisk about 2 cups of leftover gravy in a pan, thin it with a splash of milk if needed, then stir in the cheese. Add the turkey and proceed as written.

Creamy Leftover Turkey Casserole Recipe

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Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 6 servings

Calories: 485

Ingredients Method Notes

Ingredients

  

• 3 tbsp unsalted butter, divided
• 1 small onion, diced
• 8 oz cremini mushrooms, sliced
• 2 garlic cloves, minced
• 3 tbsp all-purpose flour
• 1 ½ cups low-sodium chicken broth
• 1 ½ cups whole milk
• 2 cups shredded sharp cheddar cheese
• 3 cups shredded or diced cooked turkey
• 1 cup frozen peas
• 8 oz egg noodles
• ½ tsp salt
• ¼ tsp black pepper
• ½ cup panko breadcrumbs

Method

 

1. Cook egg noodles in salted boiling water 1 to 2 minutes less than package directions; drain and set aside.
2. In a large oven-safe skillet, melt 1 ½ tbsp butter over medium heat. Sauté onion and mushrooms with a pinch of salt for about 6 minutes, until softened and lightly browned.
3. Add garlic and cook 30 seconds. Stir in flour and whisk 1 minute. Slowly pour in broth and milk, whisk until smooth. Simmer 3 to 4 minutes until thickened. Remove from heat, stir in cheddar until melted, then season with salt and pepper. Preheat oven to 375°F (190°C).
4. Fold in noodles, turkey, and peas. Spread evenly in the skillet or transfer to a greased 9×13 dish.
5. Mix panko with remaining 1 ½ tbsp melted butter, sprinkle on top. Bake 25 to 30 minutes until bubbly and golden. Broil 1 to 2 minutes for extra crunch if desired. Rest 5 minutes, then serve.

Notes

Let the casserole rest a full 5 minutes after baking so the sauce sets. If your turkey is dry, fold it in gently and let it rehydrate in the sauce as the casserole bakes; it will turn tender. Use a block of cheddar and grate it yourself for the smoothest sauce.