Double chocolate chip cookies

1. In a mixing bowl, beat together the butter and sugars until fluffy and slightly lighter in colour (8-10 minutes). Add the egg and vanilla; beat until combined. In a separate bowl, sift together the flour, baking powder, bicarbonate of soda and cocoa with a generous pinch of salt. Fold this into the butter mixture with the white chocolate; mix until combined into a stiff dough. Cover the bowl and chill for at least 30 minutes (ideally 1 hour).

2. Preheat the oven to 200˚C, gas mark 6. Line 2 trays with baking parchment. Take half the dough out of the fridge. Scoop slightly heaped tablespoons and roll into balls. Sit on the tray and flatten a little; bake one tray at a time for 10 minutes until cracks start to form. Cool on the tray until slightly firmed up; transfer to a wire rack. Repeat with the remaining cookie dough and serve either warm or cooled.