If you love classic pot pie but not the fuss of rolling two crusts, this chicken pot pie casserole is for you. A creamy, savory filling loaded with tender chicken, carrots, peas and celery bakes in a 9×13 dish under a blanket of flaky biscuits, and it tastes every bit as cozy as the original.
In this post I cover why the method works, the ingredients, step-by-step instructions, how to use puff pastry instead of biscuits, smart shortcuts, fixes for common problems and how to make it ahead or freeze it. The printable recipe card with exact measurements is at the bottom of the post.
Why You Will Love This Chicken Pot Pie Casserole
Pot pie is one of those dinners that makes everyone at the table go quiet for a minute. Turning it into a casserole keeps everything people love about it and removes the parts that slow you down.
- No pie crust to roll. Refrigerated or homemade biscuits, or a sheet of puff pastry, go straight on top.
- A real, from-scratch sauce. Butter, flour, broth and milk make a silky gravy with no canned soup, and it only takes about 10 minutes.
- Feeds a crowd. A 9×13 dish serves eight hearty portions, so it is perfect for families, potlucks and new-parent meal trains.
- Uses leftovers well. Rotisserie chicken, leftover roast chicken or even holiday turkey all work.
- Make-ahead friendly. Assemble the filling a day early and bake when you are ready.
It is the kind of easy chicken pot pie dinner I make on a Sunday and happily eat for lunch the next two days.
Ingredients You Will Need
Most of these are pantry and fridge staples. Here is what each one brings to the dish.
- Cooked chicken: About 4 cups shredded or diced. A store-bought rotisserie chicken gives just about exactly that.
- Butter: The base of the sauce and a big part of that rich, homey flavor.
- Onion, carrots and celery: The classic trio. Dice them small so they soften in the skillet.
- Garlic and thyme: Fresh thyme is lovely, but dried works fine. A pinch of poultry seasoning is a nice extra.
- All-purpose flour: Thickens the sauce. Cook it in the butter for a minute so it does not taste raw.
- Chicken broth and whole milk: Together they make a gravy that is creamy but not heavy. Use low-sodium broth so you can control the salt.
- Frozen peas: Stir them in at the end so they stay bright green. Frozen corn or green beans also work.
- Biscuits: One 16.3-ounce can of large refrigerated biscuits (8 count), or 8 homemade buttermilk biscuits.
- Egg wash: One egg beaten with a splash of milk gives the topping a glossy, golden finish.
How to Make Chicken Pot Pie Casserole
Heat the oven to 400°F (200°C) and grease a 9×13-inch baking dish. Then follow these steps.
- Soften the vegetables. Melt the butter in a large, deep skillet over medium heat. Add the onion, carrots and celery with a pinch of salt and cook for 6 to 8 minutes until the onion is translucent and the carrots begin to soften. Stir in the garlic and thyme for 30 seconds.
- Make the roux. Sprinkle the flour over the vegetables and stir constantly for 1 to 2 minutes until it coats everything and smells slightly toasty.
- Build the sauce. Slowly whisk in the warm broth, then the milk. Bring to a gentle simmer and cook, stirring, for 3 to 5 minutes until thick enough to coat a spoon.
- Add chicken and peas. Stir in the chicken and frozen peas. Season with salt and pepper to taste, remembering the biscuits add a little salt too.
- Assemble. Pour the hot filling into the baking dish and spread it out evenly.
- Top. Arrange the biscuits over the filling in a 2-by-4 grid, leaving small gaps so steam can escape. Brush with egg wash.
- Bake. Bake for 25 to 30 minutes until the biscuits are deep golden and cooked through and the filling is bubbling at the edges. If the tops brown too fast, tent loosely with foil.
- Rest. Let the casserole stand for 10 minutes so the sauce thickens before serving.
The filling should be hot all the way through. If you started with cooked chicken, it only needs to be reheated, but I still like to check that the center reaches 165°F (74°C), especially when the filling was made ahead and chilled.
Biscuit or Puff Pastry Topping?
Both toppings are delicious, so choose by mood. Biscuits give you a soft, fluffy, dumpling-like layer that soaks up the gravy. Puff pastry gives you a shatteringly crisp, buttery lid that tastes closest to a classic pot pie.
How to Use Puff Pastry
Thaw one sheet of frozen puff pastry in the fridge. Roll it out slightly on a floured surface so it covers most of the dish, or cut it into squares. Lay it over the hot filling, cut a few slits for steam and brush with egg wash. Bake at 400°F (200°C) for 25 to 30 minutes until puffed and deep golden.
For a shortcut pie crust version, use one refrigerated pie crust, crimping the edges against the dish. It will need about 30 to 35 minutes.
Tips for the Best Chicken Pot Pie Casserole
- Keep the filling hot. Putting biscuits on a hot filling helps their bottoms cook through instead of turning gummy.
- Do not overcrowd the biscuits. A little space between them lets steam escape and every side bake up golden.
- Taste the sauce before assembling. This is your last chance to adjust salt, pepper and herbs.
- Use dark and white meat. A mix of both from a rotisserie chicken gives the most flavor and the juiciest bites.
- Cut vegetables small. Quarter-inch pieces soften fully in the time they spend in the skillet.
Shortcuts for Busy Weeknights
On a hectic night, a few smart shortcuts get this casserole in the oven in about 15 minutes without losing that homemade taste.
- Rotisserie chicken. Shred it while the vegetables cook. Save the bones for broth another day.
- Pre-chopped mirepoix. Many stores sell diced onion, carrot and celery together in the produce section.
- Frozen peas and carrots. Skip the fresh carrots and add the frozen blend with the chicken.
- Canned biscuits. They bake up tall and golden and need nothing more than an egg wash.
- Prep the night before. Dice the vegetables and shred the chicken, then store them in the fridge so dinner is mostly assembly.
Looking for more cozy bakes? Try my cheesy chicken pasta casserole or the dump and bake chicken and rice casserole for busy nights. You can browse every weeknight favorite in my dinner ideas collection.
Easy Variations
- Turkey pot pie casserole. Use leftover Thanksgiving turkey instead of chicken. It is a wonderful day-after dinner.
- Extra veggies. Add diced potatoes (parboiled for 5 minutes), mushrooms, corn or green beans.
- Cheddar biscuit topping. Sprinkle 1 cup shredded sharp cheddar over the filling before adding the biscuits.
- Herby and bright. Stir in 2 tablespoons fresh parsley and a squeeze of lemon at the end.
- Lighter version. Use 2% milk and reduce the butter to 4 tablespoons. The sauce will be slightly thinner but still creamy.
- Gluten-free option. Thicken with a gluten-free flour blend and use gluten-free biscuits.
What to Serve With Chicken Pot Pie Casserole
Chicken pot pie casserole is a complete meal on its own, with protein, vegetables and bread in one dish. Still, something fresh on the side balances all that creamy comfort.
A crisp green salad with a tangy vinaigrette is my first choice. The fall harvest salad with apples is perfect this time of year, and simple roasted green beans or steamed broccoli also work beautifully. For dessert, a warm fruit crisp keeps the cozy theme going.
Common Mistakes and How to Fix Them
| Problem | Likely cause | How to fix it |
|---|---|---|
| Filling is runny | Sauce not simmered long enough or no resting time | Simmer until it coats a spoon and rest the casserole 10 minutes before serving |
| Biscuit bottoms are doughy | Filling was cold or biscuits packed too tightly | Top a hot filling, leave gaps and bake a few minutes longer tented with foil |
| Sauce is lumpy | Cold liquid added too fast | Whisk warm liquid in gradually, or blend briefly with an immersion blender before adding chicken |
| Bland flavor | Low-sodium broth without enough seasoning | Season the sauce well and add thyme, poultry seasoning or a splash of lemon |
| Tops browning too fast | Oven runs hot or rack too high | Bake on the middle rack and tent loosely with foil for the last 10 minutes |
Make Ahead, Storage and Reheating
To make ahead, prepare the filling, cool it quickly and refrigerate it covered for up to 24 hours. When you are ready, reheat it on the stove until steaming, pour it into the dish, add the biscuits and bake as directed. Topping cold filling with raw biscuits is the main cause of doughy bottoms, so warm it first.
Refrigerate leftovers within 2 hours and eat them within 3 to 4 days. Reheat individual portions in the microwave or the whole dish, covered, at 350°F (175°C) until the center reaches 165°F (74°C), following the USDA recommendations for handling leftovers.
To freeze, cool the filling and freeze it on its own for up to 3 months. Thaw overnight in the fridge, reheat until bubbling, then top with fresh biscuits or pastry and bake. Freezing the baked biscuits works, but they soften on reheating.
Frequently Asked Questions
Can I use raw chicken?
Yes. Dice 1 1/2 pounds of boneless chicken and cook it in the butter before the vegetables until it reaches 165°F (74°C), then remove and add it back with the peas.
Can I use cream of chicken soup instead of making a sauce?
You can mix two cans of condensed soup with 1 cup milk, but the from-scratch sauce tastes fresher and takes only about 10 minutes.
How do I keep the biscuits from getting soggy?
Pour the filling in hot, leave gaps between biscuits and let the casserole bake until the biscuits are deep golden.
Can I use frozen mixed vegetables?
Yes. Use about 3 cups of a frozen pea and carrot blend and skip the fresh carrots, adding them with the chicken.
What size dish should I use?
A 9×13-inch dish is ideal. For a smaller household, split the filling between two 8×8-inch dishes and freeze one before topping.
Ready to cook? Here is the full printable chicken pot pie casserole recipe with exact measurements and estimated nutrition.
Chicken Pot Pie Casserole
Ingredients
Method
- Heat the oven to 400°F (200°C) and grease a 9×13-inch baking dish.
- Melt the butter in a large deep skillet over medium heat. Add the onion, carrots and celery and cook 6 to 8 minutes until softened. Stir in the garlic and thyme for 30 seconds.
- Sprinkle in the flour and stir for 1 to 2 minutes.
- Slowly whisk in the warm broth, then the milk. Simmer, stirring, 3 to 5 minutes until thick.
- Stir in the chicken and peas and season with salt and pepper.
- Pour the hot filling into the baking dish. Arrange the biscuits on top with small gaps between them and brush with egg wash.
- Bake 25 to 30 minutes until the biscuits are deep golden and the filling bubbles. Tent with foil if browning too fast.
- Rest 10 minutes before serving.
Notes
I hope this chicken pot pie casserole becomes one of your go-to comfort dinners. If you make it, please leave a comment and a star rating below and let me know whether you went with biscuits or puff pastry. Happy baking! Chef Amber
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