Mix the matcha with some (soy) milk until it is dissolved. Mix well with the rest of the milk, the banana and the ice cubes in a blender until foam forms on top.
If you like it sweet, you can also add a little sugar, honey or maple syrup. Pour into a glass and serve dusted with matcha powder.
Vanilla soy milk tastes very good on the other hand. The frappuchino can also be prepared without a banana.