In a martini shaker or reusable cup with lid place ice up to the rim.
Pour simple syrup and espresso over ice.
Place lid on container and shake vigorously (the longer you shake the more foam you will get).
Pour into glass and top with milk.
Notes
The trick with this recipe is that it calls for less syrup and more espresso than a standard 16 oz beverage, which makes it a little sweeter and foam-ier for maximum espresso mmmm-ing.