Cake

Cake is a food block that can be eaten by the player.

Obtaining
Once the cake is placed, it cannot be recollected even with the use of Silk Touch.

From trading
Expert-level farmer villagers can sell cake for a single emerald each.

Info
Unlike most food, cake cannot be eaten as an item in the hotbar. Before being eaten, it must first be placed on top of a solid block.

Each cake has seven "slices"; each use consumes one slice progressing inward from the west. A single slice restores hunger and 0.4 hunger saturation. Eating all seven slices of a cake restores hunger and 2.8 hunger saturation.

Since eating a cake comes with no animation, cake can be eaten at a rate of one slice per tick. Multiple players can eat from the same cake at the same time. $$, eating cake makes no sound, unlike other foods.

As a redstone component, when connected to a comparator, a whole cake emits a signal strength of 14. The signal strength decreases two units with each slice.

Breaking
Once the cake is placed, it cannot be recollected even with the use of Silk Touch.

Pandas
Pandas move toward a dropped cake, to pick up and eat it.

Composting
Placing a cake into a composter raises the compost level by 1.

Block data
$$, cake uses the following data values:

Interaction

 * Because cake is only $7/8$ blocks wide, it is possible to stand on the edge of a block beneath a cake.
 * Cake destroys falling blocks if placed under them, similar to a torch.
 * It is possible to place cake on top of another cake by placing a cake on the ground, then placing another cake on the side of a block above and to the side of the first cake, similar to placing torches on a chest. Eating the lower cake causes the upper cake to disappear, the same as mining out the block of cake it is sitting on.
 * It is also possible to place cakes (or any other block) on top of cakes by sneaking and placing a cake on top of another cake
 * Mobs on top rotate while attempting to move, a pathfinding oversight shared with fences.
 * If cake is placed in a one block deep hole, players can get across the hole without jumping, although a player standing on the cake must jump to get out of the hole.
 * Cake can be used to create a functioning staircase, by placing a cake on each level of a 1 block by 1 block incline. This would be one of the most labor-intensive staircases available, given the requirements to craft a cake, compared to all other possible methods for creating a staircase.

Miscellaneous

 * Cake was added to Minecraft following the ModDB 2010 Indie of the Year Awards. Notch agreed to add cake to Minecraft if it won, which led to a campaign called "The Quest For Cake". Minecraft won 3 of the 7 awards, including the "Indie of the Year" award.
 * Placing a cake makes the same sound as placing wool.
 * The player can place cake on top of a bed, and while sleeping, the cake shows on your screen as if it were on top of your head.
 * The name of the achievement is a reference to the internet meme "The Cake is a Lie", which originated from Valve's game, Portal.
 * On May 17, 2019, for the 10th anniversary of Minecraft, the cake model was changed to display a "10" above it, made of white concrete.
 * $$, only the second slice of cake shows the inside of the cake texture. The rest of the slices show the side of the cake.