Chicken Pot Pie Casserole

I made this Chicken Pot Pie Casserole last Tuesday and honestly it’s just easier than dealing with pie dough. You get the same creamy chicken thing going on but you’re not rolling anything out or worrying about soggy bottoms.

Why You’ll Love This Recipe

• Takes 40 minutes start to finish, which is faster than ordering delivery some nights
• The biscuit topping gets these crispy edges that soak up the sauce underneath
• You’re using one skillet and one baking dish. That’s it.
• Frozen peas go straight in, no thawing or extra prep
• The flour-butter paste thing actually works to thicken everything without lumps
• Tastes like you made chicken pot pie but you didn’t have to mess with pastry

The Story Behind This Recipe

I got tired of pot pie recipes that required two hours and a pie crust I’d inevitably screw up. Last month I had leftover rotisserie chicken and a can of biscuits about to expire, so I just threw together what made sense. The herbs hit different when you cook them in butter first instead of just stirring them into cold filling — that’s the part that actually matters here. This chicken casserole version stuck because it’s what I’ll actually make on a weeknight instead of just thinking about making pot pie and ordering takeout instead.

What You Need

You need 1 tablespoon of butter for the skillet first, then 2 tablespoons melted butter at the end for brushing. Don’t skip that second part because it’s what makes the biscuit topping actually taste like something instead of just being there.

For the vegetables you’re looking at 1/2 cup each of diced carrots, diced onion and diced celery. I cut mine pretty small, like quarter-inch pieces, so they cook in those 3 to 4 minutes without staying crunchy. One clove of garlic gets minced — I just smash it with the side of my knife and chop from there.

The herbs are 1/2 teaspoon each of dried thyme and dried rosemary, plus 1/2 teaspoon of poultry seasoning and 1/2 teaspoon of black pepper. You need all of them because that’s what makes this taste like chicken pot pie instead of just chicken casserole with random stuff on top.

1/4 cup of all-purpose flour goes in to make the paste that thickens everything. Then 1 1/4 cups of chicken broth and 3/4 cup of heavy cream turn into the sauce. I used regular heavy cream, not half-and-half, because you want it thick.

2 cups of cooked chicken, chopped — rotisserie works, or I’ve used leftover grilled chicken. 1 cup of frozen peas goes straight from the freezer. One can of refrigerated biscuits, whatever size your store has, gets cut into quarters. Cooking spray for the dish. 1 tablespoon of minced parsley at the very end.

How to Make Chicken Pot Pie Casserole

Get your oven going to 350°F and spray a baking dish with cooking spray. I used a 9x13 but honestly anything around that size works as long as it’s not too deep or the biscuits won’t cook right.

Melt 1 tablespoon of butter in a large skillet over medium heat. Toss in your 1/2 cup each of diced carrots, onion, and celery, then add the minced garlic clove, 1/2 teaspoon of thyme, and 1/2 teaspoon of rosemary. Stir it around for 3 to 4 minutes until the vegetables start getting softer but they’re not mushy. The smell changes when the garlic and herbs heat up — it goes from raw to kind of toasted and that’s when you know it’s ready for the next step.

Add your 1/2 teaspoon of poultry seasoning, 1/2 teaspoon of black pepper, and 1/4 cup of flour all at once. Keep stirring for about 2 minutes until it makes this paste that starts turning light brown. It’ll look weird and clumpy at first but just keep moving it around.

Pour in the 1 1/4 cups of chicken broth and 3/4 cup of heavy cream slowly while you stir. The sauce gets thick pretty fast, like it goes from liquid to coating-the-spoon in maybe a minute. When I made this the sauce got so thick I thought I messed up, but that’s actually what you want because the peas and chicken are about to water it down a little.

Stir in your 2 cups of chopped cooked chicken and 1 cup of frozen peas. The peas will start thawing from the heat of everything else. Move the whole thing into your sprayed baking dish and spread it out so it’s even.

Take your can of refrigerated biscuits and cut each one into quarters — I just used a knife and did it right on the counter. Lay them in one layer on top of the chicken mixture. They don’t have to be perfect or touching, just sort of covering most of the surface.

Bake for 20 minutes until the biscuit topping turns golden brown and puffs up. Mine had these little cracks on top that I wasn’t expecting but they looked right. Take it out and immediately brush the 2 tablespoons of melted butter over the biscuits, then sprinkle the 1 tablespoon of minced parsley on top.

Let it sit for 10 to 15 minutes before you serve it. The sauce keeps thickening as it cools down and if you dig in right away it’ll be too liquidy and burn your mouth.

What I Did Wrong the First Time

I didn’t let the flour paste cook long enough because I got impatient and the whole thing tasted like raw flour underneath the chicken pot pie flavor. You actually need those full 2 minutes of stirring even though it feels like nothing’s happening. The paste has to go from white to kind of tan or you’ll regret it later when you’re eating dinner and wondering why it tastes off.

Chicken Pot Pie Casserole

By Emma

Prep:

10 min

Cook:

30 min

Total:

40 min

Servings:

6 servings

Ingredients

• 1 tablespoon butter
• 1/2 cup carrots, diced
• 1/2 cup onion, diced
• 1/2 cup celery, diced
• 1 clove garlic, minced
• 1/2 teaspoon dried thyme
• 1/2 teaspoon dried rosemary
• 1/2 teaspoon poultry seasoning
• 1/2 teaspoon black pepper
• 1/4 cup all-purpose flour
• 1 1/4 cups chicken broth
• 3/4 cup heavy cream
• 2 cups cooked chicken, chopped
• 1 cup frozen peas
• 1 can refrigerated biscuits (size varies, cut into quarters)
• cooking spray
• 2 tablespoons melted butter
• 1 tablespoon minced parsley

Method

1. 1 Preheat the oven to 350°F and prepare a baking dish by coating it thoroughly with cooking spray.
2. 2 Over medium heat in a large skillet, melt butter. Add diced carrots, onion, celery, minced garlic, thyme, and rosemary. Sauté for 3 to 4 minutes until vegetables become softer and aroma deepens, but still hold some crispness.
3. 3 Sprinkle in the poultry seasoning, black pepper, and flour. Stir continuously until a paste forms and starts to take on a light brown hue over 2 minutes, signaling the raw flour flavor is cooked out.
4. 4 Gradually pour in chicken broth and heavy cream while stirring. Watch as the mixture thickens, becoming glossy and coating the back of your spoon. The scent of herbs with cream should fill the air.
5. 5 Stir cooked chicken and frozen peas into the sauce, distributing heat so peas start to thaw, then transfer the entire mixture into the prepared baking dish.
6. 6 Quarter the biscuits and arrange them in a single layer atop the chicken mixture. Depending on the size of your dish, the number of biscuit pieces will vary but cover evenly.
7. 7 Place in the oven and bake for 20 minutes, observing the biscuit tops as they rise and turn a light golden brown with faint crackles.
8. 8 When done, brush the biscuit tops with melted butter to add sheen and richness, then sprinkle with minced parsley for a fresh pop of color and mild bite.
9. 9 Let the casserole rest uncovered for 10 to 15 minutes to settle and allow the sauce to thicken further before serving.

Nutritional information

Calories

380

Protein

23g

Carbs

25g

Fat

22g

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Tips for the Best Chicken Pot Pie Casserole

Don’t use a deep baking dish or the biscuits steam instead of getting that crispy top. I tried this in a deeper 8x8 once and the middles stayed doughy while the edges burned.

Cut your vegetables the same size so they all finish cooking at the same time. If your carrots are chunky and your celery’s thin the texture gets weird and some pieces stay hard.

When you notice the sauce thickening in the skillet it’ll look too thick, like gravy that sat out too long. That’s the right consistency because the frozen peas release water as they heat up and thin it back out.

The biscuit quarters puff up differently depending on where you place them — the ones touching the edge of the pan get crispier and the middle ones stay softer. I started putting more around the perimeter on purpose after I figured that out.

Let the melted butter sit for a minute before you brush it on so it’s not scalding hot and soaking straight through the biscuits.

Serving Ideas

I put this next to a simple green salad with vinaigrette because the casserole’s already rich enough. Roasted Brussels sprouts work too if you want something that can sit in the oven while the chicken pot pie finishes.

Cornbread on the side sounds wrong but it’s not — the sweetness cuts through all that cream. I just use the boxed mix because I’m not making two things from scratch.

Leftover casserole goes on top of rice the next day and it’s basically chicken and rice but fancier because of the biscuit pieces mixed in.

Variations

Turkey instead of chicken works the exact same way, especially after Thanksgiving when you’ve got leftovers sitting around. The flavor’s a little deeper but the poultry seasoning already bridges that gap.

If you hate peas use green beans cut into half-inch pieces. They don’t release as much liquid so your sauce stays thicker and you might need to add a splash more broth before baking.

Cheddar biscuits from the tube turn this into a whole different thing — more Southern, less classic pot pie. I tried it once and it was good but my husband said it didn’t taste like chicken casserole anymore so I went back to regular.

Swap the heavy cream for half-and-half if you want it lighter but you’ll need to add an extra tablespoon of flour or the sauce won’t coat right.

FAQ

Can I use fresh vegetables instead of the diced carrots, onion and celery? Yeah that’s what I used. Fresh works better than frozen for these three because frozen vegetables release too much water during the initial sauté and you end up steaming them instead of getting that caramelized smell.

What if I don’t have rotisserie chicken? Any cooked chicken works — grilled, poached, even leftover baked chicken thighs. Just chop it up into bite-size pieces so it mixes evenly into the sauce.

How do I know when the flour paste is cooked enough? It goes from bright white to tan and smells toasted instead of raw. If you taste a tiny bit on your finger it shouldn’t have that chalky flour taste anymore.

Can I make this ahead and bake it later? You can assemble everything up to adding the biscuit topping and refrigerate it for a few hours. Add the biscuits right before baking or they’ll get soggy sitting on the wet filling.

Why is my sauce too thin after baking? You probably didn’t cook the flour paste long enough or you didn’t let it rest after pulling it from the oven. That 10 to 15 minute rest time is when the sauce finishes thickening up.

What size baking dish do I actually need? 9x13 is what I used but 8x8 works if you’re halving the recipe. Just don’t go deeper than 2 inches or the biscuits won’t bake through before the filling dries out.

Can I use homemade biscuits instead of the canned kind? Sure but you’ll need to bake them halfway before putting them on top or they won’t cook all the way through. The canned ones are thinner so they finish in those 20 minutes at 350°F.

Do I have to use heavy cream or can I substitute milk? Milk makes it too thin and you lose that pot pie richness. Half-and-half is the lightest I’d go and even then you might need extra flour.

How do I store leftovers? Cover it and stick it in the fridge for up to 3 days. The biscuit topping gets softer as it sits in the sauce but it still tastes fine.

What’s the best way to reheat this? Oven at 325°F for about 15 minutes covered with foil. Microwave makes the biscuits rubbery and the sauce separates weird.

Can I freeze chicken pot pie casserole? I wouldn’t freeze it with the biscuits already on top because they turn mushy when you thaw and reheat. Freeze just the filling and add fresh biscuits when you’re ready to bake it.

Why are my biscuits burning before the filling is hot? Your oven’s probably running hot or you put the dish too close to the top heating element. Move it to the center rack and check at 15 minutes instead of waiting the full 20.

What if I can’t find poultry seasoning? Mix equal parts sage, thyme, and a pinch of black pepper. It’s not exactly the same but it gets you close enough that you won’t notice in the final dish.

Do the frozen peas need to be thawed first? No, they go straight from the freezer into the hot filling. They’ll thaw from the heat and if you thaw them ahead of time they turn mushy and make the sauce watery.

Can I add more vegetables? Mushrooms work if you sauté them with the other vegetables at the start. Corn’s fine too but don’t add more than an extra half cup total or the ratio of sauce to filling gets off.

How do I keep the bottom biscuits from getting soggy? You can’t completely stop it but making sure your sauce is thick enough before you add the biscuits helps. Also cutting them into quarters instead of leaving them whole lets them cook faster.

What kind of chicken broth should I use? I use the boxed low-sodium kind so I can control the salt. The canned stuff works too but it’s saltier so taste before you add extra seasoning.

My filling is bubbling but the biscuits look pale, what do I do? Turn the oven up to 375°F for the last 5 minutes to brown the tops. The filling’s already hot so you’re just coloring the biscuit topping at that point.