It has been called the 'King of Dressings' or the best dip, or every ones all-time favorite on wings, fries, vegetables, pizza, pretty much anything.Ranch dressing is a type of salad dressing made of some combination of buttermilk, salt, garlic, onion, mustard, herbs and spices mixed into a sauce based on mayonnaise or another oil emulsion. Sour cream and yogurt are sometimes used as a substitute to create a lower-fat version. Ranch dressing has been the best-selling salad dressing in the United States since 1992, when it overtook Italian dressing.It is also popular as a dip and flavoring for chips and other foods as well as the favorite of my family(not me though). In light of the popularity of Ranch there are a few things you should know about the 'King of Dressings' Ranch Dressing.