Brew an espresso shot using a coffee maker or a small pot.
Combine the chocolate milk and hazelnut syrup in a saucepan over low-medium heat.
Whisk the mixture until it becomes smooth. Be careful not to boil it, only steam the mixture.
Take your serving glass and pour the brewed espresso or coffee into it.
Add some ice cubes to the glass.
In a jar, combine the heavy cream, milk, and vanilla syrup. To thoroughly mix the ingredients, shake the jar.
Now, froth the mixture for 20-30 seconds using a handheld frother until it becomes foamy.
Pour the frothed cold foam over the espresso shot in the glass. This will create a foamy layer on top.
Finally, drizzle some caramel sauce over the foam as a topping.
Your delicious Dutch Bros Hazelnut Truffle Mocha is now ready to be served! Enjoy!