Here’s a cozy, crowd-pleasing Chicken Pot Pie Casserole. It has all the creamy, herb-flecked filling of the classic pie, but is topped with golden, fluffy biscuits or a buttery pastry crust for an easy, no-fuss assembly.
Chicken Pot Pie Casserole
Serves: 6-8
Prep Time: 20 minutes
Cook Time: 25-30 minutes
Ingredients
For the Filling:
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4 tbsp (1/2 stick) unsalted butter
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1 medium yellow onion, diced
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3 medium carrots, peeled and diced small
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2 celery stalks, diced small
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1/3 cup all-purpose flour
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2 cups chicken broth (low-sodium preferred)
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1 cup whole milk (or half-and-half for extra richness)
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1 tsp poultry seasoning (or a mix of dried sage, thyme, and rosemary)
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1/2 tsp garlic powder
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Salt and freshly ground black pepper, to taste
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4 cups cooked, shredded or diced chicken (from a rotisserie chicken or about 1.5 lbs cooked breasts)
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1 cup frozen peas (no need to thaw)
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2 tbsp fresh parsley, chopped (optional)
For the Topping (Choose One):
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Biscuit Option: 1 can (16 oz) refrigerated buttermilk biscuits (like Pillsbury Grands)
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Puff Pastry Option: 1 sheet frozen puff pastry, thawed, and 1 egg beaten with 1 tbsp water (egg wash)
Instructions
1. Preheat & Prep:
Preheat your oven to 400°F (200°C). Lightly grease a 9×13-inch baking dish.
2. Sauté the Vegetables:
Melt the butter in a large, deep skillet or Dutch oven over medium heat. Add the diced onion, carrots, and celery. Cook, stirring occasionally, for 6-8 minutes, until the vegetables are softened and the onion is translucent.
3. Make the Creamy Base:
Sprinkle the flour over the softened vegetables and stir constantly for 1-2 minutes to cook the raw flour taste out. Slowly pour in the chicken broth while whisking continuously to prevent lumps. Then pour in the milk. Add the poultry seasoning, garlic powder, salt, and pepper. Bring the mixture to a gentle simmer, stirring frequently, and cook for 3-5 minutes until it has thickened to the consistency of a creamy gravy.
4. Add the Chicken and Peas:
Remove the skillet from the heat. Stir in the shredded chicken and frozen peas until everything is evenly combined. Taste and adjust the seasoning if needed. Pour the entire filling into your prepared 9×13-inch baking dish and spread it into an even layer.
5. Add the Topping:
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For Biscuits: Arrange the raw biscuits evenly over the top of the bubbling filling, leaving a little space between each one.
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For Puff Pastry: Gently roll out the puff pastry sheet on a lightly floured surface to fit the dish. Drape it over the filling, trim the excess, and crimp the edges. Cut a few small slits in the top for steam to escape. Brush the pastry generously with the egg wash.
6. Bake:
Place the casserole in the oven. Bake for 20-25 minutes for biscuits (until they are golden brown and cooked through), or 25-30 minutes for puff pastry (until deeply golden and the filling is bubbly). If the topping is browning too quickly, tent it loosely with foil.
7. Rest & Serve:
Let the casserole rest for 5-10 minutes before serving; this helps the filling set up slightly. Garnish with fresh parsley and serve hot.
Tips for the Perfect Pot Pie Casserole
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Rotisserie Chicken is a Time-Saver: It adds great flavor and cuts down on prep. You need about 4 cups of meat.
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Don’t Skip Sautéing the Veggies: This step ensures the carrots and celery are tender in the final dish, as they won’t soften much more in the oven.
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Make-Ahead Friendly: Assemble the filling and pour it into the baking dish up to 2 days ahead. Cover and refrigerate. Add the topping just before baking, adding 5-10 extra minutes to the cook time since it’s going in cold.
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Change Up the Herbs: Fresh thyme leaves added with the broth make the filling beautifully fragrant.
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Frozen Vegetable Shortcut: In a pinch, use 2 cups of frozen mixed vegetables (carrots, peas, corn, green beans) instead of fresh carrots and peas. No need to thaw—just stir them in.
Let me know if you need a gluten-free or dairy-free version!