
Add ¼-cup evaporated milk (we are looking for a deep caramel color; add up to ¼-cup more if needed). Once it comes to a boil, reduce the heat to medium low and simmer until thickened, 8 to 10 minutes.
Use a strong Pakistani or Indian loose leaf black tea for best results. I like to use Tapal Danedar or Brook Bond Red Label (the version produced in the UAE).