Preheat the oven to 375°F and grease a 9-inch pie pan.
Press biscuit dough evenly into the bottom and up the sides of the pie pan to form a crust.
Bake the crust for 10 minutes until lightly golden, then set aside.
Cook sausage in a large skillet over medium heat, breaking it apart until browned and fully cooked.
Sprinkle flour over the cooked sausage and stir, cooking for 1 minute.
Gradually pour in milk, stirring constantly to prevent lumps.
Simmer the mixture for 5-7 minutes until gravy thickens.
Season gravy with salt, black pepper, garlic powder, and onion powder to taste.
Pour sausage gravy into the baked biscuit crust and spread evenly.
Sprinkle shredded cheddar cheese on top if desired.
Bake the pie for an additional 15-20 minutes until the gravy bubbles and crust is golden brown.
Let the pie cool for a few minutes before slicing and serving hot.