Cookie

Cookies are a food that are easily obtainable, but do not restore a lot of hunger or saturation.

Trading
Farmer villagers will sell 6 cookies for an emerald.

Food
Cookies can be eaten to restore and 0.5 saturation.

Video
Note: this video was created before cocoa beans could be found in jungles, and before they could be farmed, making the information quite outdated.