This sourdough apple pie is a classic inspired recipe that features a buttery sourdough discard pie crust, and delicious fresh sliced apples. If you're looking for sourdough discard recipes that are sure to impress, you have to try this sourdough apple pie recipe. The crust is made with discard, and the filling is very simple to make. This sourdough dessert recipe is perfect for Fall baking, Thanksgiving, or Christmas, but really it is welcome any time of year! Perfect for using up extra apples.