Cocoa Beans

Cocoa beans (also known as the brown dye) are a primary color dye used for making cookies and brown wool. They can be found on Cocoa Pods, which grow on the side of jungle trees.

Farming
The player is able to plant Cocoa Beans on the side of Jungle tree logs. The Cocoa Pod has three stages of growth. During its first, the pod is small and green. In the second stage, the plant is bigger and colored tan. In its last stage, the pod is even bigger and orange. When destroyed in the first two stages, the pod will only yield one Cocoa Bean. When destroyed in the third stage, it will give two or three Cocoa Beans. Bone meal can be used to immediately mature the Cocoa Pod to its last stage of growth. Cocoa Beans will become harvested, when pushed by a piston. CoCoa Beans can also be harvested by water

History
Jeb said during his Dreamhack presentation that cocoa trees are pending. Cocoa beans are among the rarest obtainable items on old worlds (after cookies) as they can only be found in dungeons generated after Beta 1.4. The use of cookies as a 'trophy item' gives cocoa considerable value on unmodified servers, even more so than diamonds. With cocoa beans now being obtainable from jungle trees in 12w18a, they are no longer as rare in the PC version, though they still remain rare in the Xbox 360 Edition (but not as rare as Golden Apples).