Sprinkle brown sugar in a slow cooker that has been sprayed with non-stick vegetable spray. Add bread to slow cooker.
Whisk together remaining ingredients except whipped cream; pour over bread. Cover and cook on high setting for 2 to 3 hours, until thickened. Do not stir.
Spoon pudding into individual bowls. Drizzle brown sugar sauce from slow cooker over pudding. Garnish with dollops of whipped topping.