Had a mont blanc down at https://janusdeli.com/ at Slacks Creek

Pretty fancy!

Generally, the Mont Blanc starts with a cold-brew coffee base that’s then swathed in a layer of cold cream and dusted with nutmeg and citrus (usually orange) zest.

I'm glad I read this because I assume I would have tried to mix it:

There’s a trick to it. Sip it straight, don’t stir it. Your instincts will tell you to mix the cream into the coffee. Resist.

Sun Devil’s resident cowboy coffee expert, Boyce, says: “No stirring allowed. Sip it like Guinness in long, slow sips.”

This style of coffee is designed to start with a sweet hit of cream, followed by the coffee (to keep flavours balanced).

Not stirring a Mont Blanc means keeping its snow-capped mountain effect intact, and ensures that you get an aromatic hit of the nutmeg and orange zest garnish each time you lift the cup toward you.

https://www.taste.com.au/food-news/mont-blanc-coffee-why-everyone-drinking-them/cx3zjnqe

and yep, it sure tasted good that's for sure :)