Steep the chai tea bag with the water according to the directions.
In a small glass, combine the cooled tea, milk, and sweetener.
Stir to combine.
Fill the glass with ice.
Sprinkle the top with cinnamon or add a cinnamon stick (optional).
Notes
If you cannot find chai tea bags, you can make your own by combining black tea with 1/2 teaspoon cinnamon, 1/4 teaspoon cardamom, 1/8 teaspoon ginger, 1/8 teaspoon cloves, and one star anise.
If you are making more than one serving at a time, or wish to make a single serving with more than one tea bag, simply multiply the spice amounts accordingly. You can also adjust them based on your preferences.
Any percentage of milk can be used instead of whole, like 2% or skim. You can also choose to use a milk alternative like oat milk, almond milk, or soy milk.
If you like to sip your iced latte slowly, I recommend freezing some of the chai tea into ice cubes so the ice you add doesn't water down your latte too quickly.