The Aztecs first knew about and drank chocolate, making it into a bitter drink sometimes mixed with chili peppers. They called it xocoatl. The Spanish brought chocolate to Europe, removing the peppers and adding sugar, creating hot chocolate. While chocolate was first only a drink, the first chocolate bar was made in the 1850s in Britain. Dark chocolate contains more cocoa and cocoa butter while milk chocolate uses milk solids. Chocolate was once thought to have health benefits and was prescribed by doctors. Today, science shows dark chocolate can help lower risks of cancer and heart disease.