Kykeon

Kykeon (from the Greek “to mix, stir”) was a beverage of water and barley (sometimes flavored with mint or thyme) popular among the working, 'lower' class of ancient Greece. In Homer's Illiad it is described as a mixture of water, barley, herbs and ground goat cheese (Book XI) and the drink is also mentioned in the Odyssey Book X when the sorceress Circe uses it, mixed with honey, to make her potion.