Homemade marshmallows are way yummier but mostly a foolproof way to impress people (they'll think you're magic). I don't have a candy thermometer (yet), but use my electric wok with the temp gauge set to approximate the temp required. Then you let it whip in your mixer for fifteen minutes and by the time your dough (small, unassuming, snot-like) ends up huge and white and fluffy, you'll begin to think you're magic too.