I made a caramelized onion dip — http://www.101cookbooks.com/archives/caramelized-onion-dip-recipe.html. I added some cayenne pepper, garlic powder, and paprika. It's good, but is missing something.
I was thinking a splash of lemon juice or white or rice vinegar, or maybe a drop or two of worcestershire sauce, but wasn't sure how that would react with all the dairy (i.e., will it make it curdle?).
Anyone have any idea, or a suggestion for giving the dip that extra something?