Preheat oven to 350F. Combine flour, egg and Nutella in a large bowl and mix together with a spoon until dough comes together and no flour lumps remain. (optional: stir in chocolate chips into the dough)
Roll dough into 1 1/2 inch balls and place on cookie sheets, about an inch apart.
Carefully press down on dough to slightly flatten, and smooth edges that may have cracked.
Bake for approx 10 minutes. Cookies should be mostly set. Let cookies cool on rack until completely set.