Can minecraft endermen spawn with dirt or grass?
Solution 1:
No sources seem to indicate that they can spawn (naturally) with a block in their hand. According to the Minecraft Wiki, they instead pickup blocks within a 4x4x3 area of where they are standing.
Commands can be used to spawn them in holding a block, but other than that, if there is no dirt/grass for them to pickup, then they will never be holding said blocks.