PREP: Bring all the ingredients to room temperature.
Preheat the fan oven to 325*F [150*C FAN, 170*C static, Gas 3).
Take the butter [that has been out of the fridge for about one hour] and cut into ½ inch [1cm] cubes, then put it into a bowl.
To the butter, add the flour and sugar and mix well with your hands. The more you work it, the more it will start looking like big breadcrumbs.
Once the ingredients are mixed but look like chucky breadcrumbs, add the chocolate chips and continue working the dough until it becomes uniform. The heat from the hands willallow the dough to get softer and uniform.
Shape the dough like a sausage, roll it in a sheet of cling film, and put it in the fridge for about twenty to thirty minutes, to set.
Once set, remove it from the fridge and slice it into 20 biscuits.
Spread the shortbread cookies evenly on a baking tray that has been covered with a baking sheet, ensuring there is at least 1 inch [2-3cm] of space between them.
Place the baking tray on the middle shelf of the oven and bake 12-15 minutes until golden brown at the bottom.
Remove the baking tray from the oven and allow the cookies to cool on it for 5 minutes before tranferring them onto a cooling rack. When freshly out of the oven, these shortbread cookies will be soft and it is important that they are allowed to cool down.
Serve and enjoy on its own or with a hot cup of tea, cocoa, or coffee!