A good vegan marshmallow that you can either cook with or eat raw is hard to come by. These are my favorites. Sweet and Sara makes the best vegan marshmallows! I also love their strawberry-flavored and coconut-covered marshmallows for eating plain.
I even served them chocolate-covered at my most recent graduation shindig. I bought a chocolate fountain (by Sephra... way cheaper than renting one) and the corresponding dark chocolate to go with it (which just so happens to be vegan! :D). Then I cut up the Sweet and Sara marshmallows (I served the original vanilla and also the strawberry kind), and I placed them on a plate right next to the running fountain.
It was a complete success! Everyone loved it, and you will, too.