Your botanical medicine class makes herbal marshmallows in lab! Yes, using real marshmallow root (althea officinalis). This herb is a demulcent (aka slimy & mucilaginous) and acts as a great soother for coughs and sore throats (inflamed mucosa). I ate them up before I thought to take a picture. So this pic I found online will have to suffice. These look pretty close to what we made:
Might not look super appetizing but slap it on a graham cracker w/ some dark chocolate and you’ll be asking for s’mores!