These Nutella-stuffed sugar cookies are rich, buttery, and filled with a gooey chocolate-hazelnut center. While they take a little extra effort to make, the results are more than worth it. Each bite delivers the perfect balance of soft cookie dough and melty Nutella, making them an irresistible treat for any occasion. Whether you’re baking for a special event or just indulging in a homemade dessert, these cookies are sure to impress.