Cream the butter and sugar together with the molasses and add the eggs, one by one. Add all the dry/sieved ingredients, the vanilla and mix this for oen minute, followed by the melted chocolate. Mix until combined before rolling into 60g balls. Press the balls down lightly on a baking tray lined with parchment paper.
Place into the oven at 200c for 8-10 minutes only so they stay goey! Place onto wire rack to cool.