i have 5 mushrooms (fresh) in my inventory, yet all mushroom recipes with the exception of mushroom spores are greyed out in the recipes menu. I tried with them in inventory, in a container nearby or on the ground, they appear with red in the recipes.
They are probably poisonous or hallucinogenic… It says it in the description.
oh yes, i see it now. So … the game is actively preventing me from getting my Darwin Award 
Ha! Yeah, I think it should be fixed but that would take some overhauling crafting.