Combine all the ingredients in a shaker or vessel with a lid and plenty of ice.
Shake for 15 to 20 seconds to create a smooth, velvety foam.
Strain into a glass, being careful not to lose the lovely foam.
Take a sip and enjoy!
We recommend a naturally processed Ethiopian Coffee for some sparkling sweet citrus notes for those who know their beans and want to upgrade their PSL. However, store-bought medium roast espresso is equally delicious.