In Jr. high (7th grade/12yo) in the early 90s, a latchkey kid friend of mine used to experiment with stuff around his house, and found some dried tubular reeds that he swore tasted like marshmallows when he smoked them.
Don’t ask me why he thought smoking that was a good idea. I met him in the gifted and talented educational program for aeronautics. Now you have me wondering if this is what he was smoking.