Preheat oven to 350° F.
In a large saucepan, melt the butter and add in the minced onion. Cook until the onions are translucent.
Add the flour to the pan and stir to cook for 30 seconds.
Add the chicken broth, stirring to combine.
While the chicken broth begins to simmer, whisk together the milk and the chicken gravy packet.
Add the milk mixture to the pan and allow the sauce to simmer until thickened. Turn off the heat and taste and season with salt and pepper, as desired.
Add the diced chicken, frozen peas and frozen hash browns to the sauce and stir to coat.
Flatten each grand biscuit before placing into a greased muffin pan, pressing the biscuit into the bottom of the pan to create a crust. Repeat with remaining biscuits.
Fill each biscuit crust with the pot pie filling.
Bake at 350° F for 10 minutes, after they have baked for 10 minutes, increase the temperature to 375° F without removing the pot pies. Bake for an additional 10-15 minutes or until the biscuits are golden brown and the filling is hot.
Enjoy!