- In a large mixing bowl, combine the shredded cabbage and grated carrots. Toss them together until evenly mixed. 
- In a separate bowl, whisk together the mayonnaise, apple cider vinegar, sugar, celery seed, salt, and black pepper until smooth and well combined. 
- Pour the dressing over the cabbage and carrot mixture. Toss everything together until the vegetables are fully coated with the dressing. 
- Cover the bowl with plastic wrap and refrigerate for at least 1 hour to allow the flavors to meld. For best results, chill for 2-4 hours. 
- Before serving, give the coleslaw a good stir and adjust seasoning if necessary.