Moist Double Chocolate cake

125 gm butter
180 ml water
2 tablespoon cocoa
100 gm dark chocolate, chopped
220 gm sugar
110 gm self raising flour
75 gm plain flour
1 egg


Grease deep 20cm round cake pan, line base and side with baking paper.
Place butter, water, cocoa, chocolate and sugar in medium sauce pan, stir over heat, without boiling, until sugar is dissolved; cool to room temperature.
Stir flours and egg into mixture, pour into prepared pan . Bake in moderately slow oven (160ºC) about 1 hour. Stand 5 minutes before turning onto wire rack to cool.