Step 1

Place milk and butter in a 6cm-deep, 8 cup-capacity, microwave-safe dish. Microwave on high (100%) for 1 minute and 30 seconds, stirring halfway through cooking, or until butter has melted.

Step 2

Stir in vanilla, caster sugar, flour and 2 tablespoons cocoa powder. Level top with a spatula. Press chocolate into batter. Sprinkle with remaining cocoa powder and brown sugar. Pour boiling water over the back of a large metal spoon to cover batter.

Step 3

Place dish on an upturned microwave-safe plate. Cook, uncovered, on medium (50%) for 10 to 13 minutes or until a skewer inserted into edge of pudding comes out clean. Set aside for 1 minute. dust with icing sugar. Serve with ice-cream.