Dissolve espresso powder with 2 tablespoons of warm water, then stir using a frother until it foams. Set aside.
In another cup, mix whipped cream with 1 tablespoon of nutella, then whip using a frother until soft peaks form. Set aside.
Spread the rest of nutella on the glass walls, then add ice. Pour oat milk into the glass, then add the espresso mixture. Finally, top it off with the whipped cream mixture. Nutella coffee latte is ready to serve. Enjoy!