Bring 6 oz of water to a boil.
While water is boiling, place the chai tea bags in a mug and set aside.
Scoop the instant espresso granules into a small teacup or bowl and set aside.
Pour 4 oz boiling water into the mug with the chai tea bags. Add the honey to the tea and stir to dissolve. Press down on the teabags with the back of a spoon to make sure they’re submerged, then let steep 5-8 minutes. Remove and discard teabags after steeping.
Pour the remaining 2 oz boiling water into the teacup with the espresso and stir until granules are completely dissolved.
At this point, you can either let the chai tea and the espresso cool completely (put it in the freezer for quicker chilling time), or you can assemble your Iced Dirty Chai Lattes. If assembling while liquids are still hot, just use a little extra ice.
To assemble: Place a generous handful of ice cubes in a 16-oz glass. Pour the chai tea over the ice, followed by the espresso, followed by the milk. Garnish with whipped cream and a sprinkling of ground cinnamon, if desired. Serve immediately.