Step 1

Brew coffee or espresso. While it's steeping, set your glass in a cup full of hot water to keep it warm.

Step 2

Meanwhile, place egg and sweetened condensed milk in a large jar. Use an electric mixer with a whisk attachment, and whisk together the egg and condensed milk for 5-6 minutes. Mixture will become very frothy and smooth.

Step 3

Serve immediately with chocolate shavings, or cocoa powder. Excellent with shortbread cookies!