Hot chocolate (also called hot cocoa, drinking chocolate or just cocoa) is a hot drink. It is usually made by mixing chocolate or cocoa powder and sugar with warm milk or water. Hot chocolate is usually drunk to make the drinker feel happier or warmer. Some studies have shown that hot chocolate may be healthy because of antioxidants that are in cocoa. Until the 1800s, hot chocolate was also used by doctors as a medicine against some diseases.