How can I add a savory note to (or otherwise improve) a sweet, cream based salad dressing?
Frequently the savory notes in a cream based salad dressing would be from a pungent cheese of some sort, like bleu or Parmesan. You could also try cutting some of the cream with buttermilk to reduce sweetness. Beyond that, it will really depend on what the rest of your ingredients are. Adding garlic powder or onion powder could also help depending on what flavor you're going for.