I can see my wife shouting at me for "poisoning" the blender now
interesting that the horse hoof fungus (Fomes fomentarius) is one listed as making the best paper, perhaps its to do with its ability to burn?
You can make paper with a heck of a lot of things, but most need to be seriously ground up first.
I know a paper maker who bought a machine that slowly grinds up denims and turns it into fibres for papermaking
Fomes used to be used to make hats (like bowlers, sort of) on the continent.
If you want to try paper making easily though, try nettles.
They make good papier mache too