White chocolate is called chocolate because it uses a part of the cacao bean, cocoa butter. Milk and dark chocolates use chocolate liquor. Cocoa butter is only a part of chocolate liquor, which is why some people don't consider white chocolate to be chocolate.
More information: Most
white chocolate sold in the supermarket is a
white chocolate confection, not real white chocolate. White chocolate confections are similar to white vanilla cake icing. The sometimes contain hydrogenated oils, and they contain no cocoa butter.
Real white chocolate contains cocoa butter and cocoa butter contains a heart healthy sterol or fatty acid known as stearic acid. White chocolate contains no cocoa solids, hence it is not technically chocolate, but is marketed as such due to cocoa butter content which is part of the cocoa bean.
Eaten in moderation white chocolate contains a healthier fat content than does artificial white chocolate.
Here are some fact on all types of chocolate.
Chocolate in all it's forms as well as real white chocolate is a
healthier choice as a treat or dessert, when eaten in moderation.
All forms of chocolate, including white chocolate have cocoa butter which contains a heart healthy sterol or fatty acid, known as stearic acid.
In addition both Dark and milk chocolate contain stearic acid as well as healthy polyphenols and nutrients known to benefit the body and to influence a positive mind set. Dark chocolate, however, contains the most nutrients and polyphenols.
Here is a link to an article that details extensively why chocolate is a healthy choice.
http://www.associatedcontent.com/article/410506/why_chocolate_makes_a_healthier_treat.html?cat=51