In a large mixing bowl, add 1 cup of cold heavy cream, 1/2 cup of powdered sugar, and 1 teaspoon of vanilla extract. Beat until stiff peaks form, about 5 minutes.

In another bowl, beat 8 ounces of softened cream cheese until smooth and creamy, approximately 3 minutes.

Add 1 cup of Nutella and 2 tablespoons of unsweetened cocoa powder to the cream cheese. Mix on low speed until well integrated.

Gently fold in the whipped cream in three additions, ensuring the mixture retains its airy texture.

Spoon the mousse into individual cups, filling them 3/4 full. Cover with plastic wrap and refrigerate for at least 2 hours.

Before serving, top each cup with whipped cream and chocolate shavings.