Matcha does contain caffeine, so if you are sensitive, you may want to increase the water to 3 cups and add a touch more mint, lime and honey to taste.
In a serving container with a lid, place the matcha powder and half a cup of water. Put a lid on the container and shake, shake, shake. You want the matcha to dissolve completely, so shake some more and then set aside.
In a blender, puree the remaining cup and a half of water and the mint until the water turns a lovely color of green.
Add the lime juice and honey and blend again to combine.
Now pour the minty-lime-honey water into the serving container and shake thoroughly to blend well. Shake, shake, shake...
Refrigerate until chilled or serve over ice and enjoy immediately. Garnish with a slice of lime and a sprig of mint.