Mix the Base: In a mixing bowl, combine Nutella, crushed biscuits, ground hazelnuts, heavy cream, and a pinch of sea salt. Stir until the mixture is smooth and well combined. It should be thick enough to hold its shape when rolled into balls.
Chill the Mixture: Cover the bowl with plastic wrap and refrigerate the mixture for about 30 minutes. This will make it easier to handle and shape into truffles.
Form the Truffles: Once chilled, use a small cookie scoop or your hands to form the mixture into bite-sized balls (about 1 inch in diameter). Place them on a baking sheet lined with parchment paper.
Coat the Truffles: Roll the truffles in cocoa powder, shredded coconut, or any other coating of your choice. Ensure they are evenly covered.
Chill Again: Place the coated truffles back in the refrigerator for another 30 minutes to firm up.
Serve and Enjoy: Once firm, the Tartufi di Nutella are ready to be served! Enjoy them as is, or package them up as delightful gifts.