Chai tea bags
Soy/almond/rice milk (I use almond)
Emulsion blender (or if you're lucky and have money, an espresso machine with a steam wand)
Since in the cafes they use a concentrated chai blend, one tea bag it's going to cut it. If you use fresh tea leaves or the stingless teabags (which are stronger) one should be fine (or a half filled tea steeper) but you'll need 2 tea bags of the kind with the string if you want that strong chai flavor.
Add 1 cup milk of choice to a sauce pan and turn heat to medium and then add 1/3 cup water. Add tea bag(s) to the milk mix and slowly bring to a boil stirring occasionally.
Once the milk starts to boil, turn off heat and remove tea bag. Now is where you can use the emulsion blender or steam wand or even just pass the mix back and forth between the pan and a cup or bowl until frothy since that's part of what makes it a latte.
Add honey for your preferred sweetness and enjoy on a cold morning! :)
(I did not take the lovely picture but found it on photobucket)