Preheat your oven to 160°C.
In the mixing bowl combine the flour, bicarb and salt. Set to one side
In the other bowl, melt the butter in the microwave and mix in the sugar before adding the egg. Add this wet mix to the dry flour mix and bring together with the wooden spoon to form a dough.
Divide the dough into 60g balls and place on the lined baking tray, leaving room to spread between each one. Push each ball down slightly then place in the oven for 6 minutes.
After the 6 minutes, take the cookies out of the oven, press 2 squares of chocolate into each one, rotate the tray then bake for a further 6 minutes.
Allow to cool slightly on the tray before serving.