Beat cream cheese, melted chocolate chips and Nutella until blended. Stir in graham cracker crumbs. Refrigerate until firm enough to roll, about 30 minutes.
Shape mixture into 1-in. balls; roll in chopped hazelnuts. Make an indentation in the center of each with the end of a wooden spoon handle. Fill with a hazelnut. Store between layers of waxed paper in an airtight container in the refrigerator.
