Follow the manufacturer’s instructions to extract a rich, concentrated shot of espresso.
The secret to a luscious latte lies in perfectly frothed milk, or in this case eggnog. If you have an espresso machine with a steam wand, place the wand just below the surface of the milk and turn it on.
Tilt the pitcher slightly to create a swirling motion. Continue steaming until the eggnog has doubled in volume and has a smooth, velvety texture.
If you don’t have a steam wand, you can heat the milk on the stovetop and whisk by hand or use a milk frother vigorously until it becomes frothy.
Pour the espresso into a mug along with the simple syrup, then pour the hot and frothy eggnog on top.
Sprinkle on a little nutmeg, optional.
Notes
The simple syrup is optional in this recipe. While I think most eggnog lattes do get sweetened, it's such a rich and creamy drink that if you want to leave it unsweetened, that's fine too. Many eggnog recipes already contain some sugar anyway.