Options to add to mix:
1 cup chocolate or white chocolate chips (whole or chopped via food processor)
Options to add to cup of prepared cocoa:
Pinch of cinnamon and/or cayenne pepper
Sprinkle of shaved chocolate
Sprinkle of crushed peppermint candy or candy cane
A shot of espresso, added before the hot water
If you prefer using fresh milk, leave the powdered milk out of the mix. Add 3 tablespoons of the powdered mixture to the mug, and fill to 1 cup with hot milk.
*The cornstarch is added to help prevent caking, so can be omitted if desired.
Recipe slightly adapted from Alton Brown.