How to Make It
Brew the coffee using whatever method you like. I use a pour-over filter, which I really love and which will most mirror a Vietnamese coffee you’d buy. Add the coffee to the filter (set over a mug) and pour a small amount of the water in a circular motion over the grounds, just enough to wet them. When you stop hearing it drip into the mug, pour the remaining water in a circular motion over the grounds.
Stir in the sweetened condensed milk, taste, and add more if you like. Drink hot and as is, or pour it into a tall glass filled with ice. Straw optional, but not really optional.