In a small sauce pan, bring 1 cup of water to a simmer. Transfer to a mug or glass container, stir in matcha powder. Stir well to remove clumps. Allow to cool to room temperature.
In the same (now empty) small sauce pan, combine 2 cups water and ¾ cups maple syrup (or sugar of choice). Bring to a simmer, stir well. Remove from heat, add rosemary sprigs. Allow to cool to room temperature. Once cooled, remove and discard rosemary sprigs.
When matcha mixture and rosemary sugar syrup are cooled to room temperature, combine both in a pitcher with 1 cup cold water. Add 1 cup lemon juice. Stir well and taste. Add up to ¼ cup more lemon juice. I like adding 2 tablespoons, but it’s a personal thing so do what tastes right. To mellow the flavor, add more water, ½ cup at a time. Allow to chill completely in the fridge before serving.
