Brew your espresso and let it cool for a few minutes before blending, or dissolve instant espresso powder in a small amount of the milk.
Add the ice cream, milk, cooled espresso, sugar, and salt to a blender.
Blend on high for 20–30 seconds until smooth and creamy, scraping down the sides if needed.
Taste and adjust — add more espresso for a stronger coffee kick or more sugar if it's too bitter.
Pour into a chilled glass, top with whipped cream and a light dusting of cocoa or espresso grounds, and serve immediately.