- With the rack in the middle position, preheat the oven to 400°F (200°C). Butter an 8-inch (20 cm) square glass baking dish, 2 inches (5 cm) high.
- In a bowl, combine the flour and baking powder.
- In another bowl, cream the sugar and butter with an electric mixer. Add the egg, milk and vanilla. Add the dry ingredients, mixing just to combine.
- In the baking dish, whisk together the brown sugar, water and cream. Using a spoon, gently scoop the batter on top of the brown sugar mixture. Bake for 35 minutes or until a toothpick inserted in the centre comes out clean. Let cool 15 minutes before serving.