After you've baked your pie crust, combine cornstarch, sugar, and wine in a pan. Let the mixture cook over medium heat while you continuously stir it until it thickens.
Once you add chopped chocolate, butter, and a touch of salt to the mix, you can add the filling to your chocolate pie crust and place it in the fridge for four hours.
Red wines like pinot noir, merlot, and Zinfandel are great options because they will infuse your chocolate pie with berry flavors as well as notes of plum and blackcurrant.