optional: 1 scoop vanilla or cream ice cream, or 2 tablespoons sweetened condensed milk
Preparation
Place two large, tall glasses in the freezer to chill. Brew the coffee, sweeten it, and mix thoroughly. Cool it down (you can place it in a pot with cold water).
Place ice in a blender container, add milk, cooled coffee, and optionally ice cream or condensed milk. Blend for a few seconds.
Remove the chilled glasses from the freezer, pour in the coffee (preferably from a height to create foam), optionally add extra ice cubes and sprinkle with brown sugar. You can also decorate with whipped cream. The coffee is best served immediately after pouring into glasses when there is the most foam.