Ingredients
Method
Preparation
- Preheat your oven to 350°F and lightly grease a 9 by 13 baking dish.
- In a large bowl, mix the chocolate cake mix, eggs, vegetable oil, milk, and vanilla extract until smooth.
- Pour half of the chocolate batter into the prepared baking dish.
Filling
- In another bowl, beat together the cream cheese, marshmallow fluff, and powdered sugar until creamy.
- Gently fold in the whipped topping until light and fluffy.
- Spoon the marshmallow filling evenly over the layer of chocolate batter.
- Carefully spread the remaining chocolate batter over the top.
Baking
- Sprinkle chocolate chips evenly across the casserole.
- Drizzle with melted butter for an extra touch of richness.
- Bake for 35 to 40 minutes until the center is mostly set and the top is rich and fudgy.
Serving
- Let it cool slightly before serving warm. For the ultimate whoopie pie flavor experience, serve it warm with a cold glass of milk and an extra spoonful of marshmallow fluff on top.
Notes
This casserole is best served warm with a scoop of vanilla ice cream. Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave.
