Dissolve coffee granules and Nesquik powder in the hot brewed espresso.
Add the sweetened condensed milk and mix well.
Store this syrup in the fridge in a container that can easily be shaken.
When you are ready to serve, put ice and milk in a glass. Shake the syrup to mix it well, then add 3-4 tablespoons of the syrup (to taste) to the milk. Stir and enjoy!
I have also used this to make a blended drink by using more ice and less milk.