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These Marshmallow Brownies are topped off with marshmallow frosting and a crunchy cereal mix made with melted chocolate and peanut butter. Over the top indulgent for those days when you need a sweet treat!
Rough day? Our marshmallow brownies are made with layers of fudgy brownies, creamy marshmallow frosting, and a crispy chocolate peanut butter cereal situation.
Breakup Brownies Are The Pick Me Up We All Need.
Thick, fudgy, warm brownies are a must when there is any kind of situation going on (happy or sad), but what if we take that to the next level with these insanely indulgent, ridiculously layered, over the top marshmallow brownies?
I’m calling these Breakup Brownies, because way back in the day when my little girl was 6 years old, she took a bite of these crazy brownies I had just mad scientisted into existence and, with all the drama she could muster, declared that these were the brownies she wanted me to make her after her first break up.
Done. Mama will make you whatever you need after that first heartbreak. <3
And, yes, these marshmallow brownies are perfect for sad situations.
You can either start with a box of brownie mix or you can really go the extra mile and make our homemade brownies as the base. (Very much recommend the homemade route for maximum heartbreak fixing.)
Then you slather on our easy marshmallow frosting.
And the real piece de resistance…the crispy chocolate peanut butter cereal situation that gets smooshed all over the top of it all. It adds the perfect not-so-sweet contrast and the crispy texture is perfect with the gooey brownies and creamy marshmallow.
♥ What We Love About This Recipe:
- Over The Top: Yes, a standard pan of brownies will always be welcome and cherished, but sometimes you just need to go the extra mile.
- Texture: These marshmallow brownies have it all! Fudgy, chewy brownies topped with the gooey marshmallow frosting followed by a layer of crispy crunchy chocolate peanut butter cereal.
- Easy-Ish: There are three different components here to make, but none of them are difficult. While we do love our homemade brownies best, these are still really delicious (and extra easy) when you start with a box mix. We recommend this one – make a double batch and bake in a 9×13 dish.
Ingredient Notes:
For the brownies:
Brownie Recipe – You’ve got a couple choices here! You can prepare my amazing homemade brownies for a 9×13 pan, baked and cooled. Or you can just keep it easy and use a box mix! Just be sure to use a family size mix or a double batch of brownies for a 9×13 pan.
For the marshmallow frosting:
Butter – Softened salted butter is key.
Marshmallow Fluff – Also known as marshmallow cream or creme, it’s basically a spreadable marshmallow topping that’s a bit like melted marshmallow.
Powdered Sugar – It’s frosting after all so we’re going to need some powdered sugar to go into the mix.
Vanilla – Some vanilla extract for balancing out the flavors.
My Favorite Vanilla!
A good quality vanilla really does make a difference and this is my favorite brand.
For the crispy topping:
Chocolate Chips – I’m using semisweet chocolate chips for these brownies! You can use milk chocolate, semisweet, or even dark chocolate if you prefer. The marshmallow layer is fairly sweet, so it’s nice to balance that out with a semisweet chocolate.
Peanut Butter – You’ll want a creamy, classic peanut butter. We like Jif or Skippy.
Rice Krispies Cereal – The classic cereal that makes everyone’s favorite brown butter rice crispy treats.
Step by Step:
Bake up a batch of brownies in a 9×13 baking dish and let them cool completely. If you frost them while warm, the frosting will melt.
Beat together the butter, fluff, powdered sugar, and vanilla until smooth and creamy. Spread it over the brownies.
Microwave the chocolate chips and peanut butter together in short bursts until melted and then stir in the cereal.
Carefully spread the cereal mixture over the frosting to smooth it out. Pop them in the fridge to chill for a few hours.
Helpful Tip!
These are delicious cold from the fridge or at room temperature, but they’re definitely less messy to cut and to eat when chilled.
Storage Instructions:
These marshmallow brownies will last in an airtight container on the counter for about 5 days.
More Brownie REcipes!
- Nutella Brownies: So gooey and fudgy!
- Blonde Brownies: The chewiest!
- Oreo Brownies: Hot fudge, Oreo cookies, and brownies – you can’t go wrong!
- Buckeye Brownies: Seriously, so good!
- Reese’s Brownies: Layers of chocolate, peanut butter, and Reese’s!
- Halloween Brownies: Perfect treats for the holiday!
Chocolate Peanut Butter Marshmallow Brownies
Ingredients
For the brownies
- 1 batch brownies for 13×9 pan baked and cooled
For the marshmallow frosting
- 1 cup butter
- 7 ounces marshmallow fluff
- 1 cup powdered sugar
- 1 teaspoon vanilla
- pinch salt
For the cereal topping
- 1 ½ cups semisweet chocolate chips
- 1 cup creamy peanut butter
- 3 cups rice krispies cereal
Instructions
- Bake and cool the brownies in a 13×9 baking dish using a box mix or our homemade recipe.
- Add the butter, marshmallow fluff, powdered sugar, vanilla, and salt to a medium mixing bowl and mix on low speed until well combined and fluffy.
- Spread marshmallow frosting over the cooled brownies.
- Add the chocolate chips and peanut butter to a mixing bowl and microwave in 30 second bursts until melted. Stir well.
- Add the cereal to the melted chocolate mixture and stir to coat.
- Drop large spoonfuls of the cereal mixture over the frosting and gently spread the cereal mixture over the frosted brownies.
- Cover and place in the refrigerator for 2 hours to chill.
- Cut into 16 slices and serve.
Tips & Notes:
Nutrition Information:
Bridgette J. says
Hi, Karly! Happy holidays to you and your beautiful family. I was just wondering if these delectable brownies need to be kept in the fridge for storage or at room temperature? I am thinking about making them for a potluck at my hubby’s work next week. Thank you for sharing your delicious recipes and stories with us. Your blog was one of the first I started following for recipes and I sincerely enjoy snd appreciate all your posts. Thank you so much! ?
Karly says
Hi Bridgette! The crunchy top layer gets a bit melty/soft if it’s kept too warm, so we like to store them in the fridge. Otherwise, they’ll last fine (nothing in the requires refrigeration), but they’ll be a bit messier when eating.
So glad you enjoy the recipes! Thank you for the sweet comment and happy holidays to you as well! 🙂
Bridgette J says
Thank you so very much for the info. I’m going to give these a whirl and I’m excited to taste test them. Your pictures of your creations are gorgeous and make me hungry. ? Sorry about the typos before. Darn autocorrect. ? Take care.
Marie says
I’m just a little bit in love with these right now
Sophie Anderson says
Give it 5 stars! Love all the layers of deliciousness in these brownies but especially chocolatey layer of Rice Krispies on top for that crispy crunchy texture.
Nancy says
I made these yesterday. So, so sweet! I did use part milk chocolate chips as I didn’t have enough semi sweet ones. I did cut them in much smaller pieces than stated in the recipe since they were so sweet. My sweet tooth loved them. Thanks!
Melissa says
Oh girl, I love your dessert style! I’m all about taking something delicious (brownies) and smothering even more deliciousness all over them (marshmallow, peanut butter!) Can’t wait to try!
David @ Spiced says
Woah! What a genius idea to mix chocolate, peanut butter and rice crispies together! I bet I could eat spoonfuls of that by itself…but then you put it on a brownie? With marshmallow frosting? Sign me up for a batch of these! Very unique, and very awesome!
Sabrina says
nice treat, thank you, I haven’t seen this before a clever marshmallow brownie with a crunch, very creative
Yvette says
What size pan did you use? 9X13?
Karly says
Whoops! Yes, a 9×13. Updated the recipe too. Thanks for asking. 🙂
Susan says
These look great!
Can you use Cocoa Krispies?
For Christmas, can you do a layer of green, white & red Marshmallow Frosting? If so, do you need to make three separate batches?
Thank you!
Karly says
You could do cocoa krispies for sure!
As for the layers of frosting, that would be an awful lot of frosting if you tripled it. I would probably divide out one batch and color them. Not sure there will really be enough frosting to layer it like that though. Maybe just sprinkle the top with red and green sprinkles instead?