Add the first four ingredients to a four quart sauce pan and cook on medium heat for 10-15 minutes. Use a large spoon to combine the three milks. As the mixture heats, sample a spoonful of the concoction. The condensed milk will be the only element of sugar in the coffee medley. That said, the concoction is intended to be sweet. If the milk blend is too sweet for your taste buds, add an additional ¼ - ½ cup of whole milk.
Use caution and do not burn the milks. The mixture should be piping hot before adding the instant coffee. If you are using a thermometer, 165 -180°F degrees is the approximate desired temperature.
Add ½ cup of NESCAFÉ Clásico instant coffee to the hot medley and combine thoroughly. If you prefer a stronger coffee intensity, add more instant coffee by the tablespoon until you achieve the desired strength.
Once the NESCAFÉ Clásico is fully integrated, you are ready to serve the hot beverage. Carefully pour 8-10 oz of the Tres Leches Coffee into four whiskey cocktail glasses or coffee mugs.
For a boozy kick, add one to two ounces of dark rum, whiskey or bourbon to your tres leches coffee. Mix well using a cocktail spoon. Finish the cocktail by adding a generous dollop of sweetened whipped cream. Top the whipped cream with one tablespoon of chocolate shavings. Now you are ready to take a sip of this gorgeous Tres Leches Coffee! I hope you enjoy it as much as I do.