In a mixing bowl, combine the Nutella and egg. Use a whisk or spatula to beat the mixture until smooth and well combined.

Gradually add the flour to the Nutella mixture, stirring gently with a spoon or spatula. The dough will become thick and slightly sticky but manageable. This step should take about 5 minutes.

Place the dough in the refrigerator and let it chill for 10 minutes. This makes it easier to shape.

First of all, now it's the perfect time to preheat the oven to 340ºF (170ºC). Now you need to line a baking tray with parchment paper. Scoop out portions of dough using a spoon or ice cream scoop, then roll them into balls with your hands. Place each ball onto the baking tray and gently flatten it slightly (use your hand for this, of a spoon). Make a small hole in the center of each cookie using your thumb, the back of a spoon, or your finger.

Bake the cookies in the preheated oven for 8 minutes. They may look soft when you take them out – that’s perfectly fine.

You just need to put Nutella in the hole you made in the cookie and enjoy this delicious snack!