Peel the apple, core, and cut up.
Pour in a slow cooker, add all the ingredients, and cook on slow for about 8hours. If your slow cooker is not that powerful it might take longer.
When it's all cook down the color will look brown and the apples will be soft. Puree the apples with an immersion blender and if you can still see traces of water after the puree continue to cook until it thickens.
Store in an airtight container and refrigerate. It can stay in the refrigerator for a couple of weeks, you can also freeze it.
Enjoy your apple butter with ice cream (just warm it slightly and pour over the (ice cream), bread
Note: You can cook it overnight. You can double the recipe and adjust the sugar to your liking.