Classic Memphis-Style Coleslaw

Coleslaw is a summer staple, and now there's an LC version! I may never buy coleslaw dressing from a shelf again. The celery seeds were a little strong and I may just omit them next time. 

1 cup mayonnaise

2 tablespoons dijon mustard

2 tablespoons apple cider vinegar

3 tablespoons Splenda

3/4 teaspoon kosher salt

1 teaspoon onion powder

2 teaspoons celery seeds

1 16 ounce bag of coleslaw mix

Combine mayo, mustard, vinegar, Splenda, salt, onion powder, and celery seeds in a large bowl. Add in coleslaw mix, toss well and refrigerate for an hour before serving and up to two days.