In a small saucepan, combine spices and whisk to break up any lumps (I used a matcha tea whisk).
Add water bring mixture to a boil; reduce heat to simmer for 15 minutes.
Remove from heat and let cool to room temperature before chilling in the refrigerator, around 2 hours. (I put the whole pot right in the fridge with a lid, to keep out any odors.)
When ready to serve, strain the tea into a glass, pressing the liquid through the strainer and stirring to break up any small lumps. Add ice (optional if you like it *really* cold) and milk to taste. Store any remaining tea in a sealed jar in the refrigerator.