For the sugars, you can reduce the amount based on the sweetness of your apples.

Place the apples as you prepare them into your slow cooker, after they are done, add the sugars, cinnamon, vanilla extract, and salt. Mix together.

Set your slow cooker to Low and cook for 10 hours, stirring every 2 hours or so. When the apple butter is thick and dark brown, it is ready.

Mash with a potato masher if you would like a chunky version, or use an immersion blender (or pour into a blender) to make a smooth version.

Pour into jars and refrigerate covered for up to two weeks or freeze in small containers.