In a medium saucepan, combine the raisins and water. Bring to a boil over medium-high heat and let it boil for 5 minutes. Tip: This step helps to plump the raisins, making them juicy and sweet.
In a small bowl, mix the brown sugar, cornstarch, cinnamon, and salt. Add this mixture to the raisin mixture and cook until thickened, about 1-2 minutes. Remove from heat. Tip: Make sure to stir continuously to prevent sticking.
Stir in the vinegar and butter, then let the filling cool for about 15 minutes. Tip: Cooling the filling prevents the crust from becoming soggy.
Place the bottom crust in a 9-inch deep dish pie plate. Spoon the filling into the crust. Add the top crust and crimp the edges. Cut vent holes. Tip: Venting allows steam to escape, keeping the crust flaky.
Bake for 30 minutes or until the crust is golden brown. Watch the edges and cover if they brown too quickly.
Let the pie cool for at least 1 hour before slicing and serving. Tip: Cooling helps the filling to set, making it easier to slice.
Notes
No alcoholic drinks allowed, please substitute with a non-alcoholic option.