Preheat the Oven: Preheat your oven to 425°F (220°C).
Prepare the Pie Crust: If using refrigerated pie crusts, let them come to room temperature as per the package instructions. Roll out one crust and place it into a pie dish.
Cook the Chicken: Cook the chicken breasts in a pot of boiling water until no longer pink in the center. Shred the cooked chicken and set aside.
Prepare the Filling:
In a large saucepan, melt the butter over medium heat.
Stir in the flour, salt, pepper, thyme, sage, garlic powder, and onion powder until well combined to create a roux.
Gradually whisk in the chicken broth and milk, ensuring no lumps form. Continue stirring until the mixture thickens.
Add Vegetables and Chicken:
Stir in the shredded chicken, frozen peas, carrots, and corn.
Simmer for a few minutes until the vegetables are slightly tender.
Assemble the Pie:
Pour the chicken and vegetable mixture into the prepared pie crust.
Roll out the second pie crust and place it over the filling. Seal the edges and trim any excess crust.
Vent the Pie: Cut a few slits on the top crust to allow steam to escape during baking.
Bake: Place the pie in the preheated oven and bake for 30-35 minutes or until the crust is golden brown.
Serve: Allow the Chicken Pot Pie to cool for a few minutes before slicing and serving.