Well, maybe not burnt — but definitely toasted. Heating the marshmallow over the fire can make the sugar caramelize, a chemical reaction that produces the brown color and toasted flavor. ... They also turn the marshmallow skin that satisfying golden color.

Can marshmallows be eaten without roasting?

Can I eat them without roasting them at all? Yes, of course! I personally find marshmallows to be tastier when toasted, but it all depends on your preference.

What happens if you toast marshmallows?

When marshmallows are roasted, a chemical change happens. When you toast marshmallows, the heat causes a chemical reaction producing water molecules, which then evaporate, leaving carbon behind (the blackened part of the roasted marshmallow).