Rachel Allen makes rich cheesecake brownies on her Cake Diaries show.

The ingredients are: 100 g butter, cut into cubes, 100 g dark chocolate, in drops or broken into pieces, 125 g caster sugar, 3 eggs, beaten, 75 g self-raising flour, 1 tbsp cocoa powder and 100 g dark chocolate, in chips or chopped into pieces.

For the cheesecake mixture: 200 g cream cheese, 2 egg yolks and 75 g caster sugar.