Preheat the oven to 190℃ (170℃ fan)/375°F/gas mark 5. Lightly grease 2 baking sheets.
Beat 150g (5oz) each, butter and sugar together until pale and fluffy.
Beat in one egg and 1 teaspoon vanilla extract, then stir in 75g (3oz) chocolate and 100g (3½oz) redcurrants.
Sift in 200g (oz) flour and 1 teaspoon baking powder and mix until well combined.
Place round spoonfuls of the mixture onto baking trays, leaving room for the cookies to spread while baking. Shape each mound into a circle.
Bake for 10 to 12 minutes until golden. Allow to cool on the baking tray for a few minutes before transferring to a wire rack to cool completely.
