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Chicken Pot Pie Casserole

nibbleboard.com/recipes/chicken-pot-pie-casserole

Prep:15 min
Cook:55 min
Total:1 hr 10 min
Servings:8

Ingredients

  • 4 tablespoons unsalted butter
  • 3 stalks celery (about 1½ cups)
  • 1 large yellow onion (about 1½ cups)
  • 1 teaspoon fresh thyme, chopped
  • 1 teaspoon kosher salt, divided
  • ½ teaspoon freshly ground black pepper
  • 4 tablespoons all-purpose flour
  • 2 cups whole milk
  • 1 cup low-sodium chicken broth
  • 1 tablespoon Dijon mustard
  • ½ teaspoon garlic powder
  • 1 cup frozen peas
  • 1 (16.3-ounce) tube refrigerated biscuit dough

Instructions

  1. Preheat oven to 375°F with a rack in the center position.
  2. Melt butter in a large skillet over medium-high heat. Add carrots, celery, onion, thyme, and ½ teaspoon salt. Cook, stirring often, until softened, about 8 minutes.
  3. Sprinkle flour over the vegetables and stir constantly for 1 minute until no dry flour remains.
  4. Pour in the milk and chicken broth while whisking. Bring to a simmer and cook, stirring frequently, until the sauce thickens enough to coat the back of a spoon, about 5 minutes.
  5. Stir in Dijon mustard, garlic powder, remaining ½ teaspoon salt, and pepper.
  6. Fold in the shredded chicken and frozen peas. Remove from heat.
  7. Transfer the filling to a 13x9-inch baking dish and spread evenly.
  8. Separate the biscuits and arrange them on top of the filling. Sprinkle biscuits lightly with salt and pepper.
  9. Bake uncovered until the filling is bubbling around the edges and the biscuits are golden brown and cooked through, 22 to 25 minutes.
  10. Let cool for 5 minutes before serving.

Nutrition per Serving

305Calories
8gProtein
37gCarbs
14gFat

Chef Tips

  • I've found that using a rotisserie chicken is the ultimate shortcut here — one large bird gives you exactly the 4 cups of shredded chicken you need, and the flavor is way better than poaching from scratch on a weeknight.
  • Don't skip the Dijon mustard. I was skeptical the first time, but it adds a subtle sharpness that rounds out the creamy filling without tasting mustardy at all.
  • After trying both ways, I always use whole milk instead of heavy cream — the filling is plenty rich without it, and the sauce holds together better the next day.
  • If you want an even crispier biscuit top, brush each biscuit with a little melted butter before baking.
  • This reheats beautifully — I make a full batch on Sunday and Matt and I eat the leftovers for lunch through Wednesday.

Storage

Cover tightly with foil or transfer to an airtight container. Refrigerate for up to 4 days.

© 2026 Nibbleboard. Nutritional data computed from USDA ingredient databases.