Cake

Notch stated if Minecraft won the Mod DB 2010 "Indie Game of the Year" award, which it did, he would add cake to Minecraft.

Cake Heals every use, and may be used six times for a total of 9 hearts, one less than the maximum 10.

Cake may be placed as a block and can be used to heal the player in that form, but will not return anything when broken.

Cake is only slightly less than one half of a block tall, and thus does not make for a very good staircase.

Crafting
The recipe for cake is 3 milk, 2 sugar, 1 egg and 3 wheat. The Milk is replaced by Empty Buckets after crafting.