Dark chocolate is a form of chocolate containing cocoa solids and cocoa butter without the milk or butter found in milk chocolate dark chocolate without added sweetener is known as bitter chocolate or unsweetened chocolate.the healthiest dark chocolates contains a cocoa percventage of 70% or higher,which provides more antioxidants and health benifits,with dark chocolates being one of the most valuable contributors of flavonols,it may well make a heart-friendly inclution in a varied,balanced Diet.