Use your preferred method to brew a strong cup of coffee.
While the coffee is brewing, heat the milk in a small saucepan over medium heat until just warm, you don't want it to come all the way to a boil.
Add the hot coffee, warm milk, and protein powder to a high-powered blender. Blend for about 30 seconds, until it is well incorporated and slightly frothy.
Pour into your favorite mug and enjoy!
To make an iced version: Pour your favorite cold brew, cold milk, and protein powder into a blender until smooth. Fill a glass with ice and pour coffee mixture over ice.