Marshmallow Log

Found in trees, it is primarily used to create Marshmallow planks.

Obtaining
Marshmallow Log can be broken by hand and will drop itself even so, but using an axe will speed up the process.

Natural generation
Marshmallow Log blocks generate naturally as part of Caramel Trees, respectively. Either can also be grown using sapling.

Fuel
Marshmallow Logs can be used as a fuel in Sugar Furnaces, smelting 1.5 items per block. It is far more efficient to craft each Marshmallow Wood block into four Marshmallow Planks: each Marshmallow Plank will burn as long as the log would have, for a total of 6 items.