01 - Prepare elbow macaroni according to package directions until al dente. Drain thoroughly and rinse under cold water to halt cooking. Allow pasta to cool completely.
02 - In a large mixing bowl, whisk together mayonnaise, sour cream, Dijon mustard, apple cider vinegar, sugar, salt, black pepper, and smoked paprika until smooth and well combined.
03 - Add cooled macaroni, celery, red bell pepper, red onion, and shredded carrots to the dressing. Gently fold together until all ingredients are evenly coated.
04 - If using, fold in sweet pickle relish and chopped fresh parsley for additional flavor and color.
05 - Cover bowl and refrigerate for at least 1 hour to allow flavors to meld. Stir gently before serving chilled. Adjust seasonings if desired.