Peel, core, and slice apples. An apple-peeler-corer slicer makes quick work of this task.
Then, add the butter and apple slices to a large sauce skillet. Sauté the apples until they are tender, 10 minutes.
Add the sugars and spices and continue to sauté until the sugars have dissolved and simmering.
Add the cornstarch to water and vinegar and whisk until cornstarch has dissolved.
Add the wet mixture to the apples and gently stir to mix. Bring to a simmer and allow the filling to thicken.
Once you have reached the desired thickness, remove from the heat and let cool before canning or storing. If you are using it immediately, let cool slightly before using it.
Notes
If canning this recipe, please read the important note in the post about using liquid Sure Jell instead of cornstarch.