Be sure to buy matcha green tea powder, not green tea powder. Matcha green tea is stronger and also much healthier.
Do not roll the balls over the matcha powder tightly to coat from all the sides, as the taste will be very bitter. Gently roll and take the balls out. Still, the step is completely optional.
One of the most common problems with these balls is that sometimes they aren't sticking together! If this is happening, then it is likely that the dates are not soft and sticky enough. In that case, simply soak the date in some hot water for a few minutes to rehydrate them. Then use in the recipe.