In a large bowl, with an electric mixer, beat the cream cheese and Nutella until smooth. Add vanilla and mix to combine. Using a rubber spatula, fold in the whipped topping until well blended and no streaks remain.
Place a brownie at the bottom of each of the trifle dishes or small glasses. Evenly pipe or spoon the filling onto the brownies and repeat layers until you reach the top of the dishes. Cover with plastic wrap and refrigerate for at least 2 hours before serving.
For the Garnish