Place apples in slow cooker. Add the remaining ingredients and stir until evenly mixed.
Cook on low for 12 hours, stirring and breaking up the apples occasionally.
Remove cover and use a blender to puree the apple butter until smooth. If you would like a thicker apple butter, return the mixture to the slow cooker and cook on low, with the lid ajar, until the desired consistency is reached.
Allow the mixture to cook and then transfer to jars. It will store in the refrigerator for up to 2 weeks, or can be stored in the freezer for up to 3 months.
Makes 3 Pints.