Experiment 115

Experiment 115 is a food item added by Twilight Forest that restores 4 hunger points. These can be found in Dark Tower loot chests. As of 1.12.2, they can be placed on a block as a singular slice each. Placing eight slices on one block to form a full cake and sprinkling Redstone on it will cause it to slowly regenerate after a slice is eaten. This effect is permanent unless the block is destroyed, in which case nothing drops. As of 1.16.5 slices can be picked back up when shift right-clicking.