Step 1

Preheat the oven to 180°C (350°F) and grease a 20cm baking round baking dish.

Step 2

Melt the butter, milk and vanilla extract in a saucepan on a low heat until the butter melts.

Step 3

In a bowl mix the sugar, flour, baking powder, cocoa and salt together.

Step 4

Pour over the wet ingredients and mix all together until just combined.

Step 5

Pour into the prepared dish.

Step 6

In a small bowl mix the brown sugar and coca together and sprinkle in a layer over the chocolate mixture.

Step 7

Pour over the boiling water (I pour mine over the back of a spoon to stop the water pushing the brown sugar mixture to one side).

Step 8

Place in the oven for 30-35 minutes. The top will be set but underneath will still be bubbly and liquid.