To make the chocolate macaroons, heat oven to 190C/fan 170C/gas 5, then line a baking sheet with baking parchment. Whisk 2 egg whites until stiff, then gradually whisk in 50g icing sugar until thick and glossy. Mix 100g ground almonds and 25g cocoa with another 50g icing sugar, then stir into the egg white mixture. Divide the mix into 12, wet your hands, then shape each piece into a ball. Place spaced apart and slightly flattened on the baking sheet. Top each with a blanched almond, then bake for 10 mins until firm, but still soft in the centre. Cool. Dust with icing sugar. Can be made 2 days ahead and kept in an airtight container.