In a large mixing bowl, combine flour, sugar and cocoa powder. Add milk, vanilla and melted butter and stir well. Pour batter into an oven safe casserole dish.
In a small mixing bowl, combine brown sugar and cocoa powder. Pour over the top of the batter in the casserole and smooth to an even layer. Pour 2 cups of hot water over the entire mixture and bake for 40 minutes.
Serve immediately with vanilla ice cream. Garnish with fresh mint, raspberries or walnuts if you like!
Recipe by Port and Fin at https://portandfin.com/molten-chocolate-pudding/