In a medium bowl, mix together the matcha powder and about 6 tablespoons of the whipping cream. Mix thoroughly until no lumps of matcha remain. Try smushing the matcha against the sides of the bowl to break it up.
Add in the rest of the whipping cream and sugar. Use a hand mixer or whisk to whip the mixture until it becomes soft peaks. The matcha cream should be creamy and hold its shape when stirred around or lifted with a spoon.
Fill a glass halfway with milk and ice. Spoon the whipped matcha cream on top of the milk. Stir together before drinking.