1. 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. Stir in chocolate chips until evenly mixed into the dough.
2. Make dough balls, about 1 1/2 inch in diameter. Place on cookie sheets, about 2 inches apart. Press down slightly on dough so the dough balls are more like very very thick round disks rather than perfectly round balls. Smooth edges that may have cracked from the pressure of pushing down on the balls, so that you have thick round smooth disks.
3. Bake for about 10 minutes. Cookies should be mostly set, but might be slightly still soft in the middle. Let cookies cool on rack until completely set. Enjoy while still slightly warm or after completely cooled.