Preheat oven to 400 degrees F.
In a large bowl, combine both sugars and peach slices. Toss gently.
Add salt, vanilla extract, cinnamon, cornstarch, lemon juice, and butter. Toss again to fully coat peach slices in mixture.
Pour prepared filling into the prepared crust.
Using the second layer of crust, top the pie off in a special design. Make sure to trim and seal the edges around the pan. Use a fork to crimp the edges of the pie together to create a better seal.
Bake pie at 400 degrees F for about 45-60 minutes, or until crust is golden brown and the filling is bubbly. If edges are browning but the middle is still not brown, you may cover the edges of the pie crust with foil and continue to bake.
Allow to cool on a wire rack. Optional: serve slightly warm with a cold scoop of vanilla ice cream on top!