Classic Coleslaw - Once Upon a Chef

Ingredients

• ¾ cup mayonnaise, best quality such as Hellmann's or Duke's
• ¼ cup sour cream
• 2 tablespoons apple cider vinegar
• 2 tablespoons sugar
• 2 teaspoons Dijon mustard
• ½ teaspoon celery seed
• ½ teaspoon salt
• ½ teaspoon freshly ground black pepper
• 1 lb (about 7 cups) prepared shredded coleslaw
• 2 scallions, dark green parts only, thinly sliced