Combine the Matcha green tea powder and Manuka honey until they are evenly mixed and have formed a paste. This will be easier if the Manuka honey is slightly warmer than room temperature, as it will be runnier.
Add the water to loosen it a bit more before applying it evenly to the face using your fingers or a brush. Be sure to avoid the eyes.
Leave on the skin for 30 minutes; the mask will set during this time. To remove the mask, either rinse with warm water or wipe away using a muslin cloth.