Ingredients
Choc sour cream frosting
Method
1.Preheat oven to 180°C (160°C fan-forced). Grease and line a deep 20cm round cake pan with baking paper.
2.Combine sugar, butter, 1/3 cup water, cocoa and soda in a medium saucepan; stir over moderate heat until sugar dissolves.
3.Bring to the boil. Reduce heat simmer for 2 minutes. Transfer mixture to a large heatproof bowl. Cool for 15 minutes.
4.Whisk flour and egg into chocolate mixture until smooth. Spoon mixture into prepared pan; smooth surface. Bake for 1 hour or until a skewer inserted at centre comes out clean. Cool for 5 minutes in pan; turn out onto a wire rack to cool completely.
5.Prepare frosting by combing chocolate, butter, sour cream and sifted icing sugar in a medium heatproof bowl oven a saucepan of simmering water (do not let bowl touch water).
6.Cook and stir until chocolate melts and icing is smooth. Remove bowl from heat ; cool slightly. Chill, stirring occasionally, for 15 minutes or until it reaches a spreading consistency.
7.Spread frosting over top and sides of cake. Decorate with chocolate curls.
To make chocolate curls: melt 150g dark chocolate. Spread on a tray or marble bench top. Once chocolate is just set, pull a sharp knife, angled slightly, to wards you across chocolate surface to create curls. You can also use chocolate bars, flaked into shards. Let cakes and slices cool completely before icing and cutting. To avoid overheating and seizing melt chocolate over low heat (or microwave in 30-second bursts). If chocolate seizes, discard then start again.
Note