Peel and chop the apples into small pieces. (Use this apple peeler to speed up the process.)
Add apples, sugar, apple cider, ground cinnamon, cinnamon sticks and whole star anise to the slow cooker. Stir until apples are coated in the ingredients.
Cook for 4 hours on low.
Remove the cinnamon sticks and star of anise
Use an immersion blender to process the apples and smooth out the texture.
Add the cinnamon sticks and whole star anise back in and cook for 5 more hours.
Let cool, remove cinnamon sticks and star of anise.
Store in mason jars.
Notes/Tips
You could easily freeze the apple butter in mason jars (leaving 1-inch headroom) or in a freezer bag.If you can't find Star of Anise, we've had readers say they didn't use it and it turned out fine.