Marshmallow Crunch Brownie Bars are rich, gooey, and indulgent. Perfect for parties, holidays, or whenever you need a decadent treat!
A pan of Brownies is the easiest comforting dessert, perfect for an afternoon snack or any kind of party. For more favorite dessert mashups, try Cookie Dough Brownies or S’mores Brownies for your next pot luck!
Sabrina’s Marshmallow Crunch Brownie Bars Recipe
Marshmallow Crunch Brownie Bars are about as over the top and decadent as brownies get, with a bunch of dark chocolate chips, unsweetened cocoa powder and….wait for it… Nutella. Yes, these brownies are a get your hands messy and don’t even care one bit about it over the top experience.
Recipe Card
Ingredients
Brownies Layer
- 3/4 cup unsalted butter , melted
- 2 1/4 cups sugar
- 2 teaspoons vanilla extract
- 3 large eggs
- 1 1/3 cups flour
- 3/4 cup unsweetened cocoa powder
- ½ teaspoon salt
- 3/4 cup dark chocolate chips
Marshmallow Layer
- 16 ounces miniature marshmallows (1 bag)
Crunchy Topping
- 2 cups dark chocolate chips
- 2 tablespoon unsalted butter
- 1 1/4 cups Nutella
- 4 cups Rice Krispies cereal
Instructions
To make the Brownie Layer:
- Preheat oven to 350 degrees. Butter and flour or use baking spray on a 13×9-inch pan.
- In a large bowl or your stand mixer, add the butter, sugar, vanilla, and eggs.
- Add in the cocoa powder, ¾ cup dark chocolate chips, and salt and until well combined.
- Add in the flour until just combined (don't overbeat).
- Bake about 25-28 minutes or just until done in the center.
- Add the bag of marshmallows over the top.
- In a microwave safe bowl add the 2 cups dark chocolate chips and butter and melt in 30 second increments until fully melted.
- Add in the Nutella and whisk completely.
- Add in the Rice Krispies Cereal and fold to combine with a spatula.
- Add evenly over the top of the marshmallow layer and pat down slightly to form a cohesive layer.
- Refrigerate until completely chilled.
- For even easier cutting, you can put the brownies in the freezer for a couple of hours to let the marshmallows harden a bit to get nice clean cuts between brownies.
Video
Nutrition
Calories: 446kcal | Carbohydrates: 66g | Protein: 5g | Fat: 19g | Saturated Fat: 15g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 0.3g | Cholesterol: 41mg | Sodium: 127mg | Potassium: 261mg | Fiber: 3g | Sugar: 46g | Vitamin A: 553IU | Vitamin C: 3mg | Calcium: 90mg | Iron: 3mg
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Table of Contents
Kitchen Tools & Equipment
- 9×13 Baking Pan: The straight edges and even cooking of this pan are ideal for bars and brownies.
- Stand Mixer: The classic stand mixer, it’s always a huge help to get things mixed a heck of a lot faster. You can use a hand mixer if you don’t have a stand mixer, or mix by hand with a whisk.
- Unsweetened Cocoa Powder: I recommend the Trader Joe’s Brand of cocoa powder.
How to Serve and Store
- Serve: Marshmallow Crunch Brownie Bars can be served at room temperature.
- Store: Store in an airtight container or wrap the pan tightly with plastic wrap. Store on the counter for up to 1 week.
- Freeze: After slicing into squares, freeze individually wrapped brownies in a large freezer safe plastic bag for up to 3 months. Thaw at room temperature before serving.
Related Recipes
More Delicious Brownie Recipes
Photos used in a previous version of this post.
I love these awesomeness marshmallow crunch brownie bars! This look so great, especially with that Nutella!
Thanks! Nutella is just the best added touch!
I’ve been asked to make desserts for a wedding, but need to bake and have them ready a few days ahead of time- how do these store? do they have to be refrigerated?
I’d store them in an air tight container at room tempature, no need to refrigerate.
Did you melt the marshmallows? It looks like a cohesive and solid layer of marshmallow, not individual miniature ones.
The heat from the brownies melted in perfectly. 🙂
Oh my heavens…. I could gobble down one (or 3) of them right now…look so yummy.
Thanks for your recipe Sabrina.
Darlene
Nova Scotia
They’re so good….it might be hard to show restraint, haha!
Can Nutella be substituted for something else in the Marshmallow Crunch Brownie Bars? I don’t cate for the taste of Nutella. Thank you.
I’ve never tested it but I’m thinking you could use peanut butter as a substitute.
Hello,
This look so yummy and so amazing(:
awesome marshmallow layer i love it!!!
These look amazing. Though I’m not a huge fan of dark chocolate, I can tweak it to my taste. Seriously thinking of using Coco pebbles in place of Krispy rice. Hehe. But, how did you get the marshmallow so gooey? Did it just melt down a bit from the heat off the brownie and the topping?
Yes, it’s a beautiful thing!! It just melts down perfectly between the two layers. Enjoy!!
These marshmallow crunch brownie bars look unreal! Definitely i will try to cook them for my kids, coz it’s better than snickers and other chocolates. Thx for sharing recipe!
You’re welcome Julia! I’m sure your kids are going to gobble them up!
So delicious! 🙂 Wow, my daughter is gonna love this! Thanks for sharing the variation in Brownie.
You’re welcome! You’ll have to come back and let me know how she liked them!
Thanks for sharing this wonderful recipe with us. It looks yummy and amazing, i think i came accross this recipe at the right time. Now i have somthing special to prepare for my kids on our next picnic. Awesome post, kudos!!!
Thanks, Janet! I hope they’re a hit at your picnic!
You say to use 2 cups dark chocolate chips, but in your instructions, you say melt the milk chocolate chips?? I am confused, please let me know, as I would like to make this soon.
Woops! Sorry for the confusion. I am a HUGE fan of dark chocolate so I use it in both the brownie base and in the topping. I updated the recipe directions for dark. That being said if you’re a fan of milk chocolate you can absolutely go with all milk chocolate here. The flavor won’t be as intense but hey different chocolate preferences for everyone 🙂
I’m seriously drooling over these brownie bars!
These are awesome!! We make one similar to this and they’re always the first to go at parties! so good!
Whoa, those look so good – and dangerous because I’d have a hard time stopping myself! 🙂
I wouldn’t worry about that too much – if there’s other grabby hands in your house they’ll be gone before you can stuff yourself!
Okay, I seriously want to shove a dozen of these in my face right now. These look fabulous.
Oh man chocolate and marshmallows are my favorite combo! These look awesome.
Love the added crunchy layer of these brownies! (I’m all about sharing sweets. I always send extras to friends and neighbors!)
So decadent and, I’m sure, delicious! No, I imagine you didn’t have any trouble sharing these goodies 🙂
Out of all the treats I made that day, I think these might have been the most popular! My husband didn’t want to share these with anyone!
I think I just fainted from seeing your pictures and reading this recipe! OMG!!! And I’m not even a huge brownie person. My hubby would go nuts over these! I would too 🙂
This looks incredible!! Love that gooey layered brownie. Wish I were there when you baked them all 🙂
Well this looks like it would definitely help out with a sweet tooth!
Oo Wow…superb! pass me some please..!
Honestly, this looks like the most epic dessert….EVER!