Sugar, corn syrup, gelatin, cold water, vanilla extract, and
salt...that easy, in order to make marshmallow, but you do need a
stand mixer though. Making marshmallow takes a little patience. Sugar
and corn syrup need to be cooked to 240 degrees, and it takes about 15
minutes to whip all the ingredients until sticky and stiff.

 Making marshmallow is a great way to learn about sugar and corn syrup
(not HFCS). Sugar does a lot of magic...it can make caramel, hard
candy, simple syrup (for cocktails...YUM), etc. And of course, hot
chocolate is never complete without a big chunk of fluffy marshmallow
melting over it!