Caramel Chocolate Trifle

Bahan-bahan (12 porsi)

• 13.25 ounces chocolate cake mix (prepared according to directions, 1 box)
• 2 cups granulated sugar
• 1 ¾ cups all-purpose flour
• ¾ cup unsweetened cocoa powder
• 1 ½ teaspoons baking powder
• 2 teaspoons baking soda
• ½ teaspoon salt
• 2 eggs
• 1 cup milk
• ½ cup vegetable oil
• 1 teaspoon vanilla extract
• 1 cup boiling water
• 2 boxes instant chocolate pudding mix (3.4 ounces each)
• 4 cups milk
• 1 ⅓ cup granulated sugar
• ⅔ cup unsweetened cocoa powder
• 6 tablespoons cornstarch
• pinch salt
• 4 ¼ cups milk
• 2 tablespoons butter
• 12 ounces frozen whipped topping (1 container, such as Cool Whip)
• 1 cup caramel sauce
• 1 cup fudge sauce