Place the peeled and sliced carrots into the slow cooker, spreading them evenly across the bottom.
In a small bowl, whisk together the brown sugar, melted butter, water, apple cider vinegar, salt, black pepper, and ground cinnamon until smooth.
Pour the glaze mixture over the carrots, stirring gently to coat them evenly.
Cover the slow cooker and cook on low for 4–5 hours, or until the carrots are fork-tender and glazed beautifully.
Before serving, stir the carrots once more to ensure they are evenly coated with the sweet, buttery glaze. Serve warm and enjoy!
Enjoy!