01 -
In a medium bowl, combine the instant espresso powder, granulated sugar, and hot water.
02 -
Whisk vigorously by hand or use an electric mixer on high speed until the mixture becomes light, fluffy, and pale in color, approximately 5 to 8 minutes. Scrape the bowl sides occasionally.
03 -
Heat the fudge sauce in the microwave for about 10 seconds until slightly warmed, then drizzle it along the interior walls of the serving glass.
04 -
Pour the sweetened condensed milk into the glass, followed by the Kahlua and half and half.
05 -
Pour the cold whole milk into the glass and gently spoon the whipped coffee mixture on top.
06 -
Using a spoon, vigorously stir the whipped coffee into the milk and Kahlua blend until fully integrated, then serve immediately.