Chicken Pot PIe Casserole

This chicken pot pie casserole is pure comfort food made simple in one easy casserole dish. My homemade sauce really takes this recipe up a notch with rich, creamy flavor that beats anything from a can.

If you love the classic flavors of traditional chicken pot pie but want to skip the whole pie crust fuss, this chicken pot pie casserole is your new favorite dinner. Instead of making a pie, the filling is simmered on the stove and poured into a casserole dish, then topped with a beautiful puff pastry lattice that’s store-bought and totally foolproof. It’s lovely enough to impress, yet easy enough for a weeknight.

Delicious! No changes needed! Keep those fantastic recipes coming, Lisa!! This 87-year-old great-great grandma loves them. I’ve been cooking since I was 9, and these recipes bring fresh twists along with the classic flavors.

This chicken pot pie casserole is the ultimate cozy comfort food that you’ll want to make again and again. It delivers all the creamy, savory goodness of a classic pot pie but skips the hassle of making and rolling out pie crust. Instead, you cook the filling on the stovetop, pour it into a casserole dish, and finish with a quick and easy puff pastry topping.

In this recipe, I’ll guide you through sautéing fresh veggies, whipping up a simple homemade roux-based sauce (which really makes this better than any canned shortcut), cooking tender chicken right in the sauce, and topping it off with puff pastry you can buy at the store. You can keep it super simple by using a single pastry sheet with vent holes, or take a few extra minutes to weave a lattice for a stunning presentation.

• Serves: about 8 hungry family members
• Total time: roughly 1 hour 15 minutes, including 25–35 minutes of baking
• Make-ahead friendly: you can prep everything up to 24 hours ahead—just add the puff pastry right before baking
• Leftovers: last 3–4 days in the fridge and reheat beautifully in the oven to keep that crust crisp

Keep reading for a step-by-step guide, photos, and tips to make this dish as easy or as special as you want.

Comfort Without the Crust

This casserole gives you everything you want from a homemade chicken pot pie—the creamy filling, the flaky golden topping—but none of the stress of rolling out a bottom crust. It’s family-friendly, straightforward, and looks pretty enough to serve guests or bring to a potluck.

• Super simple prep: The entire filling cooks in one pot and then you just pour it into your casserole dish. No juggling double crusts or fiddly dough needed.
• Real homemade flavor: A quick roux with chicken stock and milk makes a luscious sauce (similar to the base of broccoli cheddar soup) that blows canned soups out of the water.
• Fast, impressive puff pastry top: Store-bought puff pastry gives you a flaky golden finish in minutes—choose either a lattice for flair or a single sheet for speed.
• Feeds a crowd: This recipe serves about 8 and bakes in 25–35 minutes. Perfect for family dinners or sharing with friends. Plus, it’s forgiving—you can swap in leftover or store-bought rotisserie chicken if you want.
• Great make-ahead option: Assemble the filling up to a day ahead to take the stress off dinner time, then pop on the pastry and bake when you’re ready.
• Leftovers reheat fantastic: Keep them for 3–4 days in the fridge and warm in the oven to refresh that crispy top.
• Easy to customize: Swap out veggies, change the topping to biscuits or pie crust, or use a 9×13 pan if you prefer (just plan for more pastry). This recipe adapts to what you have and what you like.

In short: big chicken pot pie casserole flavor, zero pie crust hassle, beautiful presentation, and leftovers that never disappoint.

This chicken pot pie casserole delivers classic comfort in a simpler, quicker way. Here’s what sets it apart:

• All the rich flavor without the double crust headache—you pour the filling directly into the dish.
• You make a homemade, creamy sauce with a roux, chicken broth, and milk that’s way tastier than canned soups.
• Store-bought puff pastry tops the casserole in a flash with golden, flaky perfection—lattice or full sheet, whatever you prefer.
• Feeds about 8, bakes in about 25–35 minutes after prepping the filling, making it perfect for family meals. For a stovetop alternative on busy nights, try homemade chicken noodle soup.
• Make-ahead friendly: assemble up to 24 hours before baking and leftovers keep well for a few days in the fridge.

Complete Ingredient List

• 4 tablespoons unsalted butter (56.5 grams)
• 2 large carrots, peeled and sliced
• 2 celery stalks, diced
• 1 small yellow onion, diced
• 2 cloves garlic, minced
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1/2 cup all-purpose flour (60 grams)
• 2 1/2 cups chicken broth (566.9 grams)
• 1 cup milk (227 grams)
• 1/2 teaspoon dried thyme
• 2 bay leaves
• 1 pound boneless skinless chicken breasts, cut into bite-sized pieces (453.6 grams)
• 1 cup frozen peas (170 grams)
• 1 sheet puff pastry, thawed (see note 2)
• 1 egg, whisked for egg wash

Assemble, Cook, and Bake

1. Preheat oven to 375°F and lightly spray a 2-quart casserole dish with cooking spray.
2. Melt butter in a large skillet or soup pot over medium heat.
3. Add sliced carrots, diced celery, diced onion, and minced garlic to the pot; season with salt and pepper and sauté until vegetables are tender, about 5–7 minutes.
4. Whisk in the flour until it forms a paste.
5. Slowly add the chicken broth while whisking, scraping up any browned bits from the pan.

6. Pour in the milk, add dried thyme and bay leaves, and bring the mixture to a gentle simmer.

   

7. Stir in bite-sized chicken pieces and cook about 10 minutes until the chicken is cooked through.
8. Remove the bay leaves and stir in frozen peas.
9. Pour the creamy filling into the prepared casserole dish.
10. Let the filling cool for a few minutes before adding the pastry to prevent sticking.
11. Top the filling with thawed puff pastry—either lay a whole sheet with slits for vents or cut strips and weave a lattice.
12. Brush the puff pastry with the beaten egg to create an egg wash.
13. Bake the casserole for 25–35 minutes until the puff pastry is puffed and golden brown.
14. Let the casserole cool about 10 minutes before serving.

Pro Tips for Perfect Results

• Watch it happen: If you want extra help, check the video in the recipe card at the bottom. It shows how to make a perfect puff pastry lattice.
• Try an oval casserole dish: Using an oval dish and weaving the lattice on a diagonal makes the most of one sheet of puff pastry, stretching it beautifully (for the pattern, see this golden lattice crust example).
• Baking in a 9×13: For a larger dish, you’ll want two sheets of puff pastry. You can cut one sheet lengthwise and the other widthwise to get the right sizes for your pan.
• Wait to add the pastry: Let your filling cool for a few minutes after pouring it into the dish before adding puff pastry. Putting the dough on hot filling can make it sticky and tricky to weave.
• Egg wash magic: Brushing the puff pastry with whisked egg gives it a stunning glossy, golden finish.
• No lattice? No problem: Simply cover with a whole pastry sheet and cut a few vents to let steam escape—just as you would with a classic double-crust apple pie.

Flavor Variations and Serving Ideas

This chicken pot pie casserole is lovely on its own, but if you want to round out your meal, here are some easy ideas:

• Soft dinner rolls are perfect, and I even love the idea of spooning some casserole on top of them for a spoonful of warm comfort.
• Simple three-ingredient mashed potatoes add a creamy side that pairs beautifully.
• For some green freshness, try a quick arugula salad tossed with a lemon vinaigrette—or quick sautéed zucchini—simple and bright.

If you try this chicken pot pie casserole or any of my recipes, please drop a comment and tell me how it goes—I love hearing from you!

Storing, Freezing, and Reheating

You can assemble this casserole up to 24 hours before baking. Just follow the recipe until the point of adding the puff pastry, then cover and refrigerate. When you’re ready to bake, add the puff pastry on top and bake as directed.

Leftovers keep tight in the fridge for 3 to 4 days. To reheat, warm covered in a 350°F oven until hot, then uncover for a few minutes at the end. This crisps up the puff pastry topping perfectly, just like fresh from the oven.

Answers to Common Questions

• Can I use rotisserie or leftover cooked chicken?

  Absolutely! Just stir in shredded or chopped cooked chicken when the recipe calls for adding raw chicken. You only need to warm it through instead of cooking for 10 minutes.

• Can I make this ahead of time?

  Yes! You can fully assemble the filling, pour it into the casserole dish, cover, and refrigerate for up to 24 hours. Just add the puff pastry right before baking.

• What if I want to skip the lattice weave?

  No worries. You can place a whole sheet of puff pastry on top and just cut a few slits for venting. There’s even a video linked in the recipe showing the lattice technique if you want to try it later, and for another example of a crisscross top, see this flaky lattice pie with juicy fruit filling.

• Can I use a 9×13 baking dish?

  Yes, but you’ll need extra puff pastry to cover it. The notes explain how to trim and piece together sheets for this size pan.

• Can I top with biscuits or completely homemade crust?

  You can, but I prefer puff pastry because it bakes thinner and cooks through during baking, giving a beautiful golden finish. If you want to go fully homemade, use your favorite pie crust recipe instead.

• How do I store and reheat leftovers?

  Keep leftovers covered tightly in the fridge for up to 3–4 days. Reheat in a 350°F oven covered to warm through, then remove the cover for the last few minutes to crisp up the top again.