Mocha log

Melted butter, to grease

4 eggs

100g (1/2 cup) caster sugar

75g (1/2 cup) plain flour, sifted

1 1/2 tbsp cocoa powder

80g dark chocolate, melted, cooled

Cocoa powder, extra, to dust

Fresh mixed berries, to serve

2 tsp instant coffee granules

1 tsp boiling water

200ml thickened cream

2 tbsp icing sugar mixture