Turn on an air circulation oven to 190 degrees C and set the rack to the middle position.

Mix together with a spatula the granulated and light brown sugar along with the butter and salt to a smooth paste.

Add to the above the egg and the vanilla extract and combine well.

Add the flour and the baking soda and mix together without overworking. Drop in the chocolate chips and fold. Refrigerate for 1 hour or even overnight.

Take an oven proof tray and place a parchment paper. Get the dough from the fridge and scoop the cookies mixture while leaving 4-5 cm space in between them and bake for about 9-10 minutes and/or until edges of the cookies start to brown just a bit, even if slightly undercooked, pale, and glossy in the centre. Halfway into the cooking turn/rotate the baking tray for the cookies to bake evenly. Allow to cool and enjoy!