In a small bowl, whisk together the matcha green tea powder and hot water until smooth and well combined. Use a bamboo whisk or a small electric frother for best results.
In a small saucepan, heat the milk over medium heat until warm but not boiling. Remove from heat and stir in the honey (or maple syrup) and vanilla extract.
In a separate bowl, whip the heavy cream until soft peaks form. This can be done using a hand mixer or a whisk.
If serving hot, pour the warm milk mixture into a mug, then gently spoon the whipped cream on top. If serving iced, fill a glass with ice cubes, pour the milk mixture over the ice, and then add the whipped cream on top.
Finally, drizzle the prepared matcha over the whipped cream for a beautiful layered effect. Serve immediately and enjoy!