The Five-layered Sugar Chest is a blocker in Candy Crush Saga, making its first official appearance in level 713. However, it is unofficially introduced both in starting configuration and appearance in level 501. This blocker can be very difficult to destroy due to the number of sugar keys needed.
Five-layered sugar chests are single-tile stationary blockers that take five matches involving sugar keys to open and therefore destroy. Each matched sugar key results in a degrade. After the first degrade, it becomes a four-layered sugar chest with only a thick red jam layer covering a pink icing layer, then after the second, becomes a three-layered sugar chest with only the pink icing layer, then after the third, becomes a two-layered sugar chest with a crumbly biscuit topping, then after the fourth and final, becomes a plain sugar chest with no toppings. These blockers cannot be destroyed by anything other than matches involving the sugar key.
Here is the difficulty of destroying a five-layered sugar chest: