1. Preheat the oven to 350°F. Spray an 8 x 8-inch baking pan with nonstick cooking spray.
2. Place the molasses, brown sugar, butter, water, egg and vanilla in the bowl fitted with the kneading/crushing blade. Mix at speed 6 for 1 minute. Scrape down the sides of the bowl.
3. In a separate bowl, stir together all remaining ingredients. Add to the molasses mixture and mix at speed 6 for 20 seconds. Scrape ingredients to the center and relaunch at speed 6 for 20 seconds.
4. Pour the mixture into the prepared pan and bake for 28-33 minutes or until a knife inserted in the center comes out clean. Sprinkle with powdered sugar or serve with lemon curd (No 229).