Melt the chocolate "au bain marie" in a bowl over a oot of hot water

Combine sugar, eggs and vanilla in a large bowl

Add bicarbonate of soda and salt

Add the flour amd stir until all ingredients are thoroughly mixed

Pour into a baking tin lined with oil and a sprinkle of flour

Bake at 170°c for 20 to 25 minutes or until cooked in the middle