Ingredients

Steps

• Preheat the oven to 180°C.
• Line a 33cm x 23cm x 5.5cm baking tin with foil and grease with butter.
• Melt the butter and dark chocolate in a bowl over a saucepan of simmering water.
• Whisk the eggs, sugar, and vanilla extract together in a clean bowl.
• Allow the melted chocolate mixture to cool slightly.
• Whisk the egg mixture into the cooled chocolate.
• Sift the flour and salt, then fold them into the chocolate mixture.
• Mix in the white chocolate pieces.
• Pour the batter into the tin and bake for 25 minutes.
• Cool in the tin, cut into squares, and sprinkle with icing sugar.