Double Chocolate Cookies

Work the soft butter with sugar and vanilla until creamy.

Add the egg and mix.

Incorporate the flour, cornstarch, baking soda, and salt, continuing to mix.

Add both types of chocolate and hazelnuts, mixing until uniform.

Let cool in the fridge for at least half an hour.

Form balls from the dough and place them on a baking sheet lined with parchment paper.

Bake in a preheated oven at 180°C for 12-15 minutes.