1. In a large mixing bowl, combine the softened cream cheese and Nutella. Beat with an electric mixer on medium speed until smooth and well-blended, about 2 minutes.
2. Add the graham cracker crumbs, vanilla extract, powdered sugar, and a pinch of salt. Mix until everything is fully incorporated and the mixture is thick and moldable.
3. Using a small cookie scoop or your hands, form the mixture into small, bite-sized balls. Try to keep them uniform for even presentation.
4. Place the formed truffle bites on a baking sheet lined with parchment paper and refrigerate for at least 1 hour. This helps them firm up nicely.
5. Once chilled, roll each truffle bite in cocoa powder until fully coated. This gives them a decadent finish and a slight bitter contrast to the sweet filling.

A little tip from my kitchen to yours: if you find the mixture a bit too sticky to work with, popping it into the fridge for about 10 minutes can help make it easier to handle.