Making your own cocoa mix is easy to do and it makes it very easy for anyone in the house to just whip up a cup without heating the milk on the stove (or resorting to those little packets!).
Click here for Alton Brown's Hot Cocoa Mix recipe
This cocoa mix has dry milk in it so you just need to put a spoonful or so in the bottom of your mug and then pour over some hot water and stir! Oh and don't forget to add the marshmallows. :)
You can store it "indefinitely" in your pantry so you'll have plenty of cocoa all winter long. Enjoy!