Peanut Butter Cheerios Marshmallow Treats

from 27 votes

Peanut Butter Cheerios Marshmallow Treats are the ultimate lunchbox addition or after-school snack! Swap in your nut butter of choice for these chewy cereal treats that come together in minutes and require no baking at all. Bonus: A scoop of your fave protein powder goes totally undetected!

A child's hand reaches for a peanut butter Cheerio's marshmallow treat.

Step aside, Rice Krispies treats! Move on over, Cinnamon Toast Crunch Bars. There’s a new stackable sweet in town and it sneaks in a one-two protein punch with the addition of creamy peanut butter. The result is marshmallow treats with a mission: To satisfy and stave off hunger for taste testers of all ages!

I like to think of these peanut butter Cheerios bars as the slightly more mature version of their Rice Krispies counterpart. They’re just as sticky-sweet, but with a bit more nutritional value and additional versatility when it comes to customizing the flavor.

If peanut butter isn’t an option due to allergies or other concerns, whisk in any other type of nut butter to ensure a touch of protein lands in ever chewy Cheerio-packed bite. And feel free to mix up the festive drizzle on top with white chocolate, dark chocolate, semisweet chocolate or a combination of all three.

These quick-fix marshmallow treats come together in minutes and make for the ultimate lunchbox addition, after-school snack or easy solution for hungry husbands (they’re kid- and adult-tested… and approved!). So grab the box of Cheerios and your favorite nut butter and get ready to satisfy those cravings with the latest and greatest marshmallow treats to hit the snack scene.

Six Simple Ingredients

Various sizes of bowls containing chocolate chips, marshmallows, unsalted butter, vanilla extract, Cheerios and peanut butter.
  • Butter: I prefer to use unsalted butter, but salted butter works too. The bars will just be a bit saltier. 
  • Marshmallows: The key ingredient that creates that classic chewy, gooey consistency we all know and love.
  • Vanilla extract: Two teaspoons enhance the overall taste and balances the sweetness of the marshmallows and peanut butter.
  • Peanut butter: Creamy peanut butter brings a nutty and smooth texture to the treats. If you prefer chunky peanut butter or want some extra crunch, feel free to use it instead.
  • Cheerios cereal: Star of the show, providing a satisfying crunch and taste to the treats. Get creative with different flavors – Chocolate Cheerios would be amazing!
  • Chocolate chips: Semisweet chocolate chips are used for drizzling atop the bars as a finishing touch that takes them to the next level of deliciousness. Because everyone knows that peanut butter and chocolate is the best combo!

See the recipe card for full information on ingredients and quantities.

Substitutions and Additions

  • If you have nut allergies or simply want to avoid peanuts, you can substitute peanut butter with almond butter, sunflower seed butter or any other nut-free spread of your choice.
  • To up the protein in these treats, stir in a scoop of your favorite protein powder with the peanut butter and then continue with the recipe as directed.
  • White chocolate, dark chocolate or even butterscotch chips can all be used to drizzle atop the bars.
  • Get creative with different toppings. Sprinkle crushed pretzels, chopped nuts or sprinkles over the chocolate drizzle for a decorative touch.

How to Make Peanut Butter Cheerios Bars

  1. Prepare the pan. Coat a 13×9-inch baking pan with cooking spray. This will prevent the bars from sticking to the pan and make it easier to remove them later.
  2. Melt the butter and marshmallows. In a large saucepan, melt the unsalted butter over low heat. Once the butter has melted, add the marshmallows to the saucepan and stir continuously until the marshmallows are completely melted and combined with the butter. Stir in the vanilla extract.
A spatula stirs melted marshmallows in a large stockpot.
  1. Add the peanut butter and Cheerios. Remove the saucepan from the heat. Stir in the peanut butter then stir in the Cheerios until they are well coated. 
  2. Press into the pan. Transfer the mixture to the prepared pan, pressing it firmly into an even layer. This step ensures the bars hold their shape once they set. 
  3. Allow to set. Let the bars cool to room temperature.
  4. Drizzle with chocolate. Once the treats are completely cooled, melt the chocolate chips in the microwave or in a double-boiler. Transfer the melted chocolate to a sealable plastic bag then pipe it across the top of the treats. (Alternately, use a fork to splatter the chocolate across the top.) Allow the chocolate to cool.
Marshmallow Cheerios bars drizzled with melted chocolate on a cutting board.
  1. Cut and serve. Use a sharp knife to cut the treats into 12 squares. Serve immediately or store in an airtight container at room temperature.

Tips for Perfect Marshmallow Treats

  • Fresh Marshmallows: Use fresh marshmallows for the recipe. Old or stale marshmallows may not melt properly, resulting in clumps or uneven texture.
  • Work Quickly: Once the marshmallow mixture is ready, work quickly to combine it with the Cheerios. As it cools, it becomes harder to spread and mix evenly.
  • Grease Your Hands or Spatula: When pressing the mixture into the pan, lightly grease your hands or spatula to prevent sticking.

Frequently Asked Questions

How long do marshmallow treats last?

These marshmallow treats will last up to two days when stored in an airtight container at room temperature.

Can I use other types of cereal?

Absolutely! You could use the classic Rice Krispies,  any variety of Chex (corn, chocolate, etc.) or even cornflakes to make equally as delicious cereal treats.

Can I add chocolate chips to peanut butter Cheerios bars?

Yes! You can fold in any other mix-in, however keep in mind that the mixture will be warm, so chocolate chips may melt.

More Recipes You’ll Love

Find inspiration with more creative twists on classic marshmallow treats.

Peanut butter Cheerios bars drizzled with chocolate and cut into perfect squares.
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Dessert

Peanut Butter Cheerios Marshmallow Treats

Peanut Butter Cheerios Marshmallow Treats include a bit of protein in every bite! They're perfect for lunch boxes or snacking on the go.
Author: Kelly Senyei
4.30 from 27 votes
A child's hand reaches for a peanut butter Cheerio's marshmallow treat.
Prep Time 20 minutes
Cook Time 10 minutes
Total Time 30 minutes
Servings 12 treats

Ingredients 

  • 3 Tablespoons unsalted butter
  • 1 (10-oz.) package marshmallows
  • 2 teaspoons vanilla extract
  • 1/2 cup creamy peanut butter
  • 6 cups Cheerios cereal
  • 1/2 cup semisweet chocolate chips

Instructions 

  • Coat a 13×9-inch baking pan with cooking spray.
  • Melt the butter in a large stockpot set over low heat. Once the butter has melted, add the marshmallows and cook, stirring, until the marshmallows have melted. Stir in the vanilla extract.
  • Remove the mixture from the heat and stir in the peanut butter then stir in the Cheerios until they are well coated. Transfer the mixture to the prepared pan, pressing it firmly into an even layer. Allow the treats to cool to room temperature.
  • Once the treats are completely cooled, melt the chocolate chips in the microwave or in a double-boiler. Transfer the melted chocolate to a sealable plastic bag then pipe it across the top of the treats. (Alternately, use a fork to splatter the chocolate across the top.) Allow the chocolate to cool then use a sharp knife to cut the treats into 12 squares. Serve immediately or store in an airtight container at room temperature.

Kelly’s Notes

  • Use fresh marshmallows for the recipe. Old or stale marshmallows may not melt properly, resulting in clumps or uneven texture.
  • Once the marshmallow mixture is ready, work quickly to combine it with the Cheerios. As it cools, it becomes harder to spread and mix evenly.
  • These marshmallow treats will last up to two days when stored in an airtight container at room temperature.
  • ★ Did you make this recipe? Don’t forget to give it a star rating below!

Nutrition

Calories: 174kcal, Carbohydrates: 14g, Protein: 4g, Fat: 11g, Saturated Fat: 4g, Cholesterol: 7mg, Sodium: 111mg, Potassium: 179mg, Fiber: 2g, Sugar: 4g, Vitamin A: 435IU, Vitamin C: 2.2mg, Calcium: 52mg, Iron: 4.2mg

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Recipe adapted from Kellogg's Rice Krispies.


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Comments

  1. 5 stars
    So easy and the grandkids say better the other marshmallow treats, and maybe just a little healthier. Thanks for the recipe, it is in the recipe box.

  2. 5 stars
    Very tasty and so quick to make. I Googled “Chocolate Peanut Butter Cheerios Bars”, since I had purchased a box of Chocolate Peanut Butter Cheerios. I found your recipe and loved the idea of adding peanut butter.

  3. 5 stars
    I squished mini chips in at the end-in lieu of the choco drizzle-due to the fact that I’m lazy, but these are so easy and tasty and even a bit healthy. The oats and peanut butter make this a more nutritious snack (or in my case, since I couldn’t wait to partake, breakfast) than the traditional rice crispy squares. A new fave!

  4. 5 stars
    These were very easy to make. They look incredible with the touch of chocolate drizzle. We haven’t eaten them yet but they smell delicious!
    Thank you for sharing!

  5. 5 stars
    So delish! I just made them again! And doubled the chocolate for the top (chocoholics in our house, the cook is the worst). Always turns out perfectly soft, and once in the pan, they set up to a nice gooey crunch. Hits the craving mark and I love that there’s a smidge more nutrition than some alternatives.

    1. Hi Christina! These marshmallow treats will last up to two days when stored in an airtight container at room temperature.

  6. 5 stars
    Delicious and easy no fuss recipe that’s almost guaranteed to be a hit. Easy to customize and very simple ingredients!

  7. 5 stars
    Omg, these were amazing! I just happened to have some Honey Nut Cheerios no one was eating. I melted mini dark chocolate peanut butter cups instead of chocolate chips and Wow!! My family of 5 really liked them.

  8. 5 stars
    I hate washing Marshmello out of pans so I cheated and used glass mixing bowl in the microwave. Turned out fantastic! Sent some home for my granddaughter, but found out that my son ate them all! They’re that good!

  9. 5 stars
    Wonderful! I’m an adult only household now so didn’t have rice crispies and found your recipe while looking for alternatives. I loved this even more! Esp. the addition of peanut butter! Used the natural creamy type and it worked perfectly, blended well and the vanilla adds a nice sophisticated taste! Thanks!

  10. 5 stars
    Loved the recipe, thank you! I had leftover marshmallows from a camping trip, and this was perfect.

  11. 4 stars
    Fantastic ! Easy to make. I improvised with chocolate flavored Cheerios. Which were great with the peanut butter !

  12. Can you use natural creamy butter? Apparently the lack of emulsifiers in the natural stuff makes it unusable in many recipes. Thx

  13. Amazing recipe! Going to try these cars with multi grain!! They are a weakness in our home! I could just imagine what will happen when I add peanut butter!!!!

  14. Well so much for trying to lose weight. I can’t leave these alone! I used Honey Nut Cheerios, and crunchy peanut butter. Thanks for the great recipe!

  15. 5 stars
    These bars were delish! Made them to take camping and they were gone way before the weekend was over. They only thing I did different was add a bit more peanut butter to both the bars and the chocolate drizzle – we’re a bit obsessed with peanut butter in our household!

    1. Rather than a nut butter like peanut or almond I would recommend sunbutter/sunflower seed butter, pumpkin seed butter, or even tahini (sesame seed butter)

  16. What a fun twist on a classic favorite!! And so easy to make. These are too perfect for back to school.

  17. These look sooooo good. Cheerios are my favourite cereal, I can’t believe I’ve never thought to make them into crispy treats or anything, and the addition of peanut butter is beyond wonderful! Thanks for the great idea!