1; Can be Multiplied as Desired
This probably isn’t like any iced coffee you’ve ever tasted—it combines strongly brewed espresso and sweetened condensed milk. For the Thai version, imagine you’re sipping the coffee from an ice-filled plastic bag through a straw—which is how it’s served by street vendors in Bangkok.
Place the condensed milk in the bottom of a tall heatproof glass. Pour in the espresso (in Vietnam it would be drip brewed right into the glass) and stir with a spoon to mix. Add enough ice cubes to fill the glass and serve immediately.