Dark chocolate (also known as black chocolate, dark black chocolate, plain chocolate, or sour chocolate) is a form of chocolate containing cocoa solids, cocoa butter, without the milk or butter found in milk chocolate. Government and industry standards of what products may be labeled dark chocolate vary by country and market.Although dark chocolate has a reputation as a healthier alternative to other types of chocolate, such as milk chocolate, high-quality evidence for significant health benefits, such as on blood pressure, has not been shown.