This recipe has been updated in July 2022 - the original recipe was: 75g dark chocolate melted with 100g butter. 250g self raising flour, 1/2 tsp bicarb, 1/2 tsp baking powder, 75g caster sugar, 75g light brown sugar whisked together. Add the melted choc/butter mix, 1 medium egg and 100ml soured cream. 300g chocolate chips.