Yes, you can substitute Miracle Whip for mayo. I do it all the time. People who don't like the taste of Miracle Whip may detect the different flavor in the dishes. But I always say, I'll bet they won't even know if I don't tell them! It can just be our little secret.  You could use Miracle Whip in Basil Mayo or Creamy Caesar dressing. Simply substitute the same amount of Miracle Whip for the mayonnaise.