!Screenshot of a Burnt Forest biome. The Burnt Forest is a biome covered with Ashes from wich grows "Burnt Trees", despite their name those "Trees" are actually fungi. No mobs other than Creepers and Silverfish can spawn in burnt forests.
!Screenshot of the Burnt Cabin structure in a Burnt Forest biome. Burnt Cabins are a structure that can be found in Burnt Forests Biomes, they do not have any loot chests for now.
Burnt Trees can be used to craft their own set of blocks and can be used to craft wooden items, but burnt wood itself cannot be used as fuel.
!Screenshot of all the steel blocks and items. Steel is a new ore that can be found very rarely unless you are in a Burnt Forest Biome in which you will find plenty of it. Raw steel can also be crafted when combining Raw Iron and Coal. Raw steel can be smelted in a furnace and turned into ingots and turned Blocks of steel, and just like Copper they can be used to craft Cut Steel Blocks which can be used to craft Stairs and Slabs.
Cender Berries are a new source of food they can be harvested from Cender Berry Bushes that can only be found in Burnt Forest biomes. They give 4 hunger points when consumed.

Desolate is a Minecraft mod wich goal is to add biomes that unlike most vanilla overworld biomes are made to feel desolate and devoided of life and even hostile. In the current version of the mod only one biome has been added.