Pour the non-dairy milk into a microwave safe mug. Microwave for 75 seconds or until hot. The amount of time needed may vary depending on your microwave.
Stir in the unsweetened cocoa powder and sugar. Stir briskly to remove any lumps.
Top with mini marshmallows if desired. Enjoy!
Notes
Your cooking time may vary based on the power of your microwave.Please carefully test the temperature of the hot chocolate before drinking, and especially before giving to children.