c.1600, from Nahuatl xocolatl, possibly from xocolia "to make bitter" + atl "water." Brought to Spain by 1520, from thence to the rest of Europe. Originally a drink; as a paste or cake made of ground, roasted, sweetened cacao seeds, 1640s.
As a color from 1776. Chocolate chip is from 1940; chocolatier is attested from 1888.