To a tall glass filled with ice, add vanilla syrup and milk. Top with ice.
Pour cooled espresso over top.
Drizzle the top and inner rim of the glass with caramel sauce.
Notes
For an iced drink, the espresso should be slightly cooled so that it doesn't melt the ice. For a hot drink, use steamed milk.To get the layered, ombré effect, you need to add them in the order described. If you wish you can decorate the glass with caramel drizzle before adding any of the other ingredients, but it's not necessary as the caramel will drip down around the edges of the glass once the drink is prepared. Feel free to substitute the milk of your choice.