You can drink any kind of Baileys whiskey this way.
For more traditional eggnog, add an unwhisked, raw egg into the shaker before mixing the drink.
As a finishing touch, drop a few espresso beans on the surface of your drink as a garnish.
As an extra garnish, sprinkle a pinch of ground cinnamon over the top of your drink.
The back of the spoon makes it easier to layer and mix the ingredients without needing to stir the drink. You can also use regular Baileys instead of Baileys Espresso Creme.
You can also use regular Baileys Irish Cream for this.