If you have ever ordered ranch salad dressing at a restaurant and exclaimed how much better it tastes, you're not alone. The real reason restaurant ranch tastes better is because most of them use powdered ranch dressing (what we're making here!) and fresh dairy - typically buttermilk, sour cream, milk, and/or mayo. It makes it much creamier and more satisfying than the bottled version, which uses more oil to be shelf-stable. You might also consider adding a couple of cloves of fresh minced garlic to the dressing.