Blackout Chocolate and Peanut Butter Cheerio Bars
If you’re searching for a delightful treat that combines the irresistible flavors of chocolate and peanut butter with the nostalgic crunch of Cheerios, you’ve just landed in the right spot! These Blackout Chocolate and Peanut Butter Cheerio Bars are not only easy to whip up, but they are also a crowd-pleaser, perfect for parties, snacks, or even a quick dessert after dinner. With a rich chocolatey base and a creamy peanut butter topping, these bars will have everyone coming back for seconds. Let’s dive into the details of this delicious recipe!
What Sets This Recipe Apart

What makes these bars truly special is their unique combination of textures and flavors. The crunch of the Chocolate and Peanut Butter Cheerios adds a delightful contrast to the soft, gooey marshmallow base, while the rich chocolate and creamy peanut butter frosting gives a decadent finish. Plus, the addition of molasses brings a hint of depth that elevates these bars to a new level. Every bite is a harmonious blend of sweet and savory, making it a go-to treat for any occasion.
What Goes In
- 4 cups Chocolate and Peanut Butter Cheerios cereal
- 1 cup mini marshmallows
- 12 oz. chocolate (use your favorite type)
- 2 teaspoons molasses
- 12 tablespoons unsalted butter
- 1/3 cup malted milk powder
- 2 tablespoons unsweetened cocoa powder
- 2 teaspoons vanilla extract
- 2 oz. semi-sweet chocolate, melted and cooled
- 2 cups powdered sugar
Tools & Equipment Needed
- Mixing Bowl: For combining the cereal and marshmallows.
- Double Boiler or Microwave: For melting the chocolate smoothly.
- 9×13-inch Baking Dish: To set the bars in; line it with parchment paper for easy removal.
- Spatula: For spreading the mixture evenly in the dish.
- Whisk: To mix the frosting ingredients until smooth.
Step-by-Step: Blackout Chocolate and Peanut Butter Cheerio Bars

Step 1: Prepare Your Baking Dish
Start by lining a 9×13-inch baking dish with parchment paper. This will make it easier to lift the bars out once they are set.
Step 2: Melt the Chocolate
In a double boiler or microwave, melt 12 oz. of chocolate until smooth. Be sure to stir it frequently to avoid burning. Once melted, set aside to cool slightly.
Step 3: Combine Cereal and Marshmallows
In a large mixing bowl, combine the 4 cups of Chocolate and Peanut Butter Cheerios with the 1 cup of mini marshmallows. Mix gently to ensure the marshmallows are evenly distributed.
Step 4: Add Chocolate Mixture
Pour the melted chocolate into the cereal and marshmallow mixture. Add the 2 teaspoons of molasses and mix until the cereal is well-coated.
Step 5: Transfer to Baking Dish
Pour the mixture into the prepared baking dish. Use a spatula to press it down firmly and evenly. This step is crucial for the bars to hold their shape once set.
Step 6: Make the Frosting
In a separate bowl, beat together 12 tablespoons of unsalted butter, 1/3 cup malted milk powder, 2 tablespoons unsweetened cocoa powder, 2 teaspoons vanilla extract, and the melted and cooled 2 oz. semi-sweet chocolate. Gradually add in 2 cups of powdered sugar until the frosting is smooth and creamy.
Step 7: Frost the Bars
Spread the frosting evenly over the top of the cooled cereal bars. Use the spatula to create a smooth finish.
Step 8: Chill and Cut
Place the baking dish in the refrigerator for at least 2 hours to allow the bars to set. Once firm, lift the bars out using the parchment paper and cut into squares or rectangles.
Spring to Winter: Ideas

- For Spring: Add fresh berries on top of the frosting for a fruity twist.
- For Summer: Drizzle with white chocolate and sprinkle with crushed graham crackers.
- For Fall: Incorporate pumpkin spice into the frosting for a seasonal flavor.
- For Winter: Top with crushed candy canes for a festive touch.
Avoid These Traps
- Don’t skip the cooling time! Allow the bars to set properly in the fridge to achieve the right texture.
- Be careful not to overheat the chocolate when melting; low and slow is the key.
- Make sure to press the mixture firmly into the baking dish; otherwise, the bars may crumble when cut.
- Use fresh marshmallows for the best consistency; stale marshmallows won’t melt properly.
Keep It Fresh: Storage Guide
To keep your Blackout Chocolate and Peanut Butter Cheerio Bars fresh, store them in an airtight container at room temperature for up to one week. If you want to extend their shelf life, you can refrigerate them, but be aware that the texture may change slightly. For longer storage, consider freezing them. Wrap individual bars tightly in plastic wrap and place them in a freezer-safe container for up to three months. When you’re ready to enjoy, simply thaw them at room temperature for a delicious treat.
Ask & Learn
Can I use different types of cereal?
Absolutely! While the Chocolate and Peanut Butter Cheerios adds a unique flavor, you can substitute it with other cereals like Rice Krispies or any chocolate-flavored cereal you prefer. Just ensure it’s a similar texture to maintain the bar’s structure.
How do I make these bars gluten-free?
To make these bars gluten-free, simply choose gluten-free chocolate and peanut butter Cheerios, and check that all other ingredients, such as chocolate and powdered sugar, are certified gluten-free.
Can I make these bars vegan?
Yes! You can substitute the unsalted butter with a plant-based butter alternative, and use dairy-free chocolate for the melted chocolate and frosting. Ensure the marshmallows you use are vegan-friendly.
What’s the best way to cut these bars cleanly?
For clean cuts, use a sharp knife that has been warmed slightly under hot water. Wipe the knife with a paper towel between cuts to keep the edges neat.
Let’s Eat
Now that you have all the details, it’s time to gather your ingredients and get started on these mouthwatering Blackout Chocolate and Peanut Butter Cheerio Bars. Whether you’re sharing them with friends or indulging by yourself, these bars are sure to satisfy your sweet tooth and leave you craving more. Enjoy every delicious bite and let the flavors transport you to a world of chocolatey, peanut buttery bliss!

Blackout Chocolate and Peanut Butter Cheerio Bars
Ingredients
Equipment
Method
- Start by lining a 9x13-inch baking dish with parchment paper. This will make it easier to lift the bars out once they are set.
- In a double boiler or microwave, melt 12 oz. of chocolate until smooth. Be sure to stir it frequently to avoid burning. Once melted, set aside to cool slightly.
- In a large mixing bowl, combine the 4 cups of Chocolate and Peanut Butter Cheerios with the 1 cup of mini marshmallows. Mix gently to ensure the marshmallows are evenly distributed.
- Pour the melted chocolate into the cereal and marshmallow mixture. Add the 2 teaspoons of molasses and mix until the cereal is well-coated.
- Pour the mixture into the prepared baking dish. Use a spatula to press it down firmly and evenly. This step is crucial for the bars to hold their shape once set.
- In a separate bowl, beat together 12 tablespoons of unsalted butter, 1/3 cup malted milk powder, 2 tablespoons unsweetened cocoa powder, 2 teaspoons vanilla extract, and the melted and cooled 2 oz. semi-sweet chocolate. Gradually add in 2 cups of powdered sugar until the frosting is smooth and creamy.
- Spread the frosting evenly over the top of the cooled cereal bars. Use the spatula to create a smooth finish.
- Place the baking dish in the refrigerator for at least 2 hours to allow the bars to set. Once firm, lift the bars out using the parchment paper and cut into squares or rectangles.
Notes
- Allow the bars to set properly in the fridge for the right texture.
- Use low heat to melt the chocolate to prevent burning.
- Press the mixture firmly into the baking dish for the bars to hold their shape.
- Use fresh marshmallows for the best consistency.
