In a small mixing bowl, whisk together first eight ingredients; set aside. In a large salad or serving bowl, mix cabbage, carrot and onion; toss with dressing. Cover with plastic wrap and chill 2 hrs. before serving.
Note: Numerous knockoff recipes for coleslaw similar to that served at KFC restaurants appear on the Internet. This recipe is based on one published by Todd Wilbur on TopSecretRecipes.com.