I am such a big fan of jello and mousse. This sounds delish.
You can also try this recipe (Classic Chocolate Mousse):
Ingredients:
1 package (3.9 ounces) instant chocolate pudding mix
1/2 cup Nutella
1 ¾ cups cold milk
1 ¾ cup whipped cream
In a large bowl, whisk milk and pudding for about 2 minutes. Let it stand or until soft. Whisk in Nutella until smooth. Fold in whipped topping.
Scoop into dessert dishes. Chill until serving. Enjoy.