01 - In a large bowl, mix the green cabbage, red cabbage, and carrots until evenly distributed.
02 - In a medium bowl, whisk mayonnaise, sour cream, apple cider vinegar, Dijon mustard, honey, celery seed if using, salt, and black pepper until smooth and fully integrated.
03 - Pour the dressing over the cabbage and carrot mixture and toss thoroughly to ensure even coating.
04 - Cover the bowl and refrigerate for at least 30 minutes to allow flavors to meld.
05 - Before serving, toss the salad again and adjust seasoning if necessary.