Spray 3- to 4-quart slow cooker with cooking spray. In slow cooker, mix milk, hot water, brown sugar, coffee powder, vanilla, chocolate, 2 of the cinnamon sticks and the ancho chile.
Cover; cook on Low heat setting 2 to 3 hours. Stir hot cocoa and remove ancho chile before serving. Garnish individual servings with whipped topping, red pepper and remaining cinnamon sticks.