Cocoa Beans

Cocoa Beans (also known as the Brown Dye) are a material used for making Cookies and brown wool. Cocoa Beans have a dark brown, patchy texture. Cocoa Beans were initially introduced in the Beta 1.2 update, but were not able to be obtained without a Inventory Editor.

As of Beta 1.4, Cocoa Beans were formally brought into the game as a reward found in dungeon chests. (80% Chance) Also as of Beta 1.4, brown sheep naturally spawn which made obtaining brown wool easier.

Notch has hinted sometime in the future they will be able to be grown.