Start by preheating the oven to 180°C.
Start by melting the dark chocolate in the microwave, or set over a pan with a simmering water. Once melted, set aside to cool down .
In a mixing bowl add the soft butter and 2 sugars and mix until light in colour, creamy and fluffy. (Check the video for visual example). Gradually add the eggs one at a time then add the cooled melted chocolate slowly while mixing until the mixture turn light and double up in volume.
In a separate bowl, mix all dry ingredients together except chocolate chips and sift over the cookie mix. Mix everything until you achieve a thick and dark chocolate cookie dough.
Fold in the white and milk chocolate chips making sure to leave some aside for decoration. Shape into 70g ball, Sprinkle sea salt and bake for 15 minutes.
Once they are baked move them to a baking rack to cool down for 10 minutes. Melt the remaining milk chocolate and use to decorate the top. Allow to cool down for 20 minutes or until chocolate fully set and enjoy.