Find a good coffee and adjust the grind as needed for your filter. Adjust the amount of sweetened condensed milk to your preferred sweetness. Often times we'll mix the sweetened condensed milk with some half and half to reduce it's sweetness.
Pour the sweetened condensed milk into an 8-10 oz. glass.
Remove the top screen from the coffee filter. Put the ground coffee in the filter, screw screen back on, compacting the grounds. Place filter on the glass with the sweetened condensed milk. Pour just enough hot water to cover the grounds and let sit for 30 sec.
Loosen the filter screen screw at least 2 full rotations. Pour hot water to top of filter, cover and let sit until water has gone all the way through filter (should be @ 5 min. at a rate of 3-4 drips/sec. If it is faster, coffee's grind is too coarse. If slower, coffee's grind is too fine.)
When water has passed though filter, remove filter from glass. Stir coffee and sweetened condensed milk together. Add ice and enjoy.
Note 1: For a slightly less sweet version, combine the sweetened condensed milk with half and half before adding it to the cup. Usually we'll mix about 1/2 sweetened condensed milk - 1/2 half and half.Note 2: For a hot version, just omit the ice at the end of the recipe. In Vietnam the hot version will often be served in a cup of hot water to help keep it warm longer.Note 3: For a quick version, replace the Vietnamese style brewed coffee with a 2 ounce shot of espresso.