You only have to make marshmallows once to see how ridiculously easy they are to create. You'll be tempted to keep that fact to yourself, though, when your friends freak out over them. Go ahead, let them think you spent the day making these tender, airy squares of fluff, when it really only takes about 15 minutes of fun in the kitchen. To avoid stickiness, try to make marshmallows on a dry day.
Cooks' Note:
Marshmallow squares keep, layered between sheets of wax paper or parchment paper in an airtight container, in a dry place at cool room temperature 1 month.