1 head green cabbage, finely shredded
    2 large carrots, finely shredded
    3/4 cup best-quality mayonnaise
    2 tablespoons sour cream
    2 tablespoons grated Spanish onion
    2 tablespoons sugar, or to taste
    2 tablespoons white vinegar
    1 tablespoon dry mustard
    2 teaspoons celery salt
    Salt and freshly ground pepper

Directions

Combine the shredded cabbage and carrots in a large bowl. Whisk together the mayonnaise, sour cream, onion, sugar, vinegar, mustard, celery salt, salt, and pepper in a medium bowl, and then add to the cabbage mixture. Mix well to combine and taste for seasoning; add more salt, pepper, or sugar if desired.