Preheat oven to 350℉ and line a baking sheet with parchment paper. Set aside.
In a mixing bowl add Nutella, flour, and egg. Mix well. Dough will be stiff, but keep stirring until blended well. Stir in hazelnuts and mix well until combined.
1 cup Nutella, ⅔ cup flour, 1 egg, ½ cup hazelnuts
Drop by a tablespoon scoop onto the prepared baking sheet. Bake for 8-10 minutes or until set. Cool on a wire rack.
Notes
You can swap the nuts if you don't have hazelnuts. Try pecans, dry roasted peanuts or walnuts.