Chicken Pot Pie with Puff Pastry

Step 1
Preheat the oven to 425 degrees F (220 degrees C).

Step 2
Melt butter in a 2-quart saucepan over medium heat. Stir in flour, onion, salt, and pepper. Cook, stirring constantly, until mixture is bubbly, 2 to 3 minutes. Stir in chicken broth and milk; bring to a boil, stirring constantly. Boil and stir for 1 minute. Stir in chicken, peas, and carrots and remove from the heat.

Step 3
Roll both sheets of puff pastry into 12-inch squares. Ease 1 sheet into the bottom of an ungreased 9-inch square pan, then pour chicken mixture on top. Place remaining pastry over the chicken mixture. Turn pastry edges under and flute.

Step 4
Bake in the preheated oven until golden brown, about 35 minutes.