*If using pre-made frozen pie pie crust, allow the crust to sit at room temperature while you make the rest of your pie so it has time to thaw.
*If using unsalted butter in the crumble, add ⅛ teaspoon of salt.
*If using a very deep 9-inch or a 9½-inch pie pan, use 8½ cups apples (you don't need to increase the rest of the filling ingredients).