To your slow-cooker, add chopped apples, apple cider, honey, cinnamon and cinnamon sticks (if using). Cover, and cook on HIGH 4 hours or LOW for 10 hours, stirring halfway through cook time.
Uncover. Remove cinnamon sticks and puree with an immersion blender, or food processor*
Cook on LOW uncovered 30 minutes to 1- hour, stirring occasionally, until thick. Will make about 2 cups (30ish tbsp).
Notes
I like Honeycrisp, Fuji, Gala, or Cosmic Crisp for this recipe
*if using food processor: allow apple butter to cool slightly before transferring to blend