These Chocolate Marshmallow Bars are a dessert lover’s dream. With a fudgy chocolate base, a layer of marshmallow fluff, and a crunchy, chocolatey topping, every bite is a perfect mix of textures and flavors. Whether you’re preparing for a party or looking for a fun weekend baking project, these bars are a guaranteed crowd-pleaser.

Why Chocolate Marshmallow Bars Are a Must-Try
These bars are a celebration of texture and taste. The rich, fudgy base provides a solid foundation for the gooey marshmallow layer, which is both sweet and satisfying. Topping it all off is a crispy, chocolatey mixture that adds a delightful crunch with every bite. They’re a versatile treat that can brighten any occasion, making them a favorite for dessert enthusiasts everywhere.
When to Make Chocolate Marshmallow Bars
Chocolate Marshmallow Bars are versatile and work for a variety of occasions. They are easy to prepare and are sure to impress at any gathering, whether casual or formal.
- Holidays and Parties: A hit on any dessert table, these bars are festive and universally loved.
- Picnics or Potlucks: Their portability makes them an excellent choice for outdoor events or group meals.
- Weekend Treats: Perfect for a family baking session or a quick sweet fix.
- Gifting: Wrap them up and share with friends or neighbors for a thoughtful, homemade gift.

Customizing Chocolate Marshmallow Bars
One of the best things about this recipe is how adaptable it is. You can tweak it to suit your preferences or add your own personal touch to make it unique.
- Add Peanut Butter: Mix a few tablespoons of peanut butter into the topping for a nutty twist that complements the chocolate.
- Sprinkle Extras: Enhance the texture and flavor with toppings like chopped nuts, sprinkles, or shredded coconut.
- Switch the Cereal: Experiment with puffed quinoa, crushed graham crackers, or even cornflakes for a different crunch.
- Use White Chocolate: Replace the semi-sweet chocolate chips with white chocolate for a sweeter, creamier variation.
Storing Chocolate Marshmallow Bars
Proper storage ensures these bars stay fresh and delicious for days. They are best stored in an airtight container at room temperature, where they will keep for up to three days. For a firmer texture, refrigerate them, but let them sit at room temperature for a few minutes before serving to soften slightly. These bars are perfect for making ahead, as their layers hold up beautifully over time.

Why You’ll Love These Bars
Chocolate Marshmallow Bars are everything you want in a dessert: easy to make, visually stunning, and completely delicious. They’re ideal for sharing with friends and family, but don’t be surprised if they disappear quickly!
Whether you’re indulging in a quiet evening treat or bringing them to a big gathering, these bars always deliver. With their rich chocolatey base, gooey marshmallow layer, and crunchy topping, they’re a guaranteed hit that you’ll want to make over and over again.

Chocolate Marshmallow Bars
Ingredients
- 3/4 cup unsalted butter softened
- 1 1/2 cups granulated sugar
- 3 eggs
- 1 teaspoon vanilla extract
- 1 1/3 cups all purpose flour
- 3 tablespoons unsweetened cocoa
- 1/2 teaspoon baking powder
- 1/2 teaspoon salt
- 7 oz tub of marshmallow fluff
Instructions
- Preheat your oven to 350°F.
- Line a 15x10x1-inch baking sheet with foil, then spray the foil with non-stick cooking spray.
- In a mixing bowl, cream together the softened butter and granulated sugar until just combined.
- Add the eggs one at a time, mixing after each addition. Stir in the vanilla extract until incorporated.
- In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
- Gradually add the dry ingredients to the wet mixture, mixing until well combined. Spread the batter evenly in the prepared pan and bake for 15-18 minutes, or until the edges are set.
- Once the cake is out of the oven, immediately spread the marshmallow fluff over the warm surface. The heat will make it easier to spread evenly. Let the layer cool for about 30 minutes.
- To prepare the topping, combine the chocolate chips, miniature marshmallows, and butter in a saucepan. Melt the mixture over medium heat, stirring until smooth.
- Once melted, mix in the rice crispy cereal until evenly coated.
- Spoon the topping over the marshmallow layer, spreading it quickly and evenly before it begins to set.
- Chill the pan in the refrigerator until the topping is firm.
- Once set, slice into bars and serve. Store the bars in an airtight container at room temperature.