Experiment 115 is a food item added by Twilight Forest. It restores 4 hunger points and has a small chance[clarify] of causing Hunger I. These can be found in Dark Tower loot chests. 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.