Add all ingredients to a 4 to 6 quart slow cooker and stir to combine.
Cover and cook on LOW for 2 hours, stirring at least three times, making sure all of the walnuts are coated.
Spoon or pour the glazed walnuts onto a rimmed baking sheet, lined with parchment paper and spread out evenly.
Allow the nuts to cool completely before eating or storing.
