Two-layered Sugar Chest

The Two-layered Sugar Chest is a blocker in Candy Crush Saga which has yet to appear at the start of a level.

Properties
Two-layered Sugar Chests are single-tile stationary blockers that take two matches involving sugar keys to open and therefore destroy. Each matched Sugar Key results in a degrade. After the first degrade, it becomes a sugar chest with no additional toppings. These blockers cannot be destroyed by anything other than matches involving the sugar key.

Here is the difficulty of destroying a two-layered sugar chest: