Heat the oven to 350°F (180°C), and line a baking sheet with parchment paper.

Add the Nutella, flour, and egg to a large bowl. Mix until well combined.
The mixture will form a thick dough but should be moist enough to roll into balls.

Using your hands roll about 8 dough balls. Place cookies on your baking sheet and flatten them slightly with your fingertips or the bottom of a glass.

Bake for 8-10 minutes, until they are cooked around the edges and still slightly soft in the middle. Let the cookies sit on the baking sheet for 5 minutes and then cool on a baking rack. Enjoy!