Marshmallow Crunch Brownie Bars

I had originally planned on using the title “Marshmallow Chocolate & Peanut Butter Crunch Brownie Bars”. That seems mighty long, but is truly the best description of these bars, and they are absolutely phenomenal. Imagine this: rich, decadent brownies. Topped with ooey, gooey marshmallows. Topped again with chocolate-peanut butter-Rice Krispy deliciousness. Folks, you just can’t get much better than these bars. Part brownie, part s’more, and part Rice Krispy treat. It’s everything you know and love, baked up into one amazing dessert.

It seems insane to think that there is any way that you can improve on these bars, but I do think there is one thing I will do differently next time: I plan on cutting the quantities for the brownie layer in half. As they are, the brownie layer is about twice as thick as the marshmallow and crisp layers, and I think these would be even more awesome if all of the layers were about equal in size. I also think that taking the chocolate/peanut butter/Rice Krispy topping and using it to make an entire pan of Chocolate-Peanut Butter Rice Krispy Treats would be heavenly. Stay tuned, because that will likely be happening very, very soon. I do have more Rice Krispies left over and, well, that seems like a perfect way to use them up!
You’ll want to hurry up and make these immediately. All of your family and friends will love you forever.
More brownies with a twist:
Chipster-Topped Brownies
Cookies and Cream Cheesecake Brownies
Samoas Brownies
1 year ago: Homemade Pierogies
2 years ago: Outrageous Brownies
Marshmallow Crunch Brownie Bars
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Yield: 24 bars
Prep Time: 30 minutes
Cook Time: 25 to 30 minutes
Total Time: 1 hour
Ingredients:
For the Brownie Base:
4 ounces unsweetened chocolate
2/3 cup unsalted butter
1¼ cups semisweet chocolate chips, divided
1-1/3 cups all-purpose flour
1 teaspoon baking powder
½ teaspoon salt
4 large eggs, at room temperature
2 cups granulated sugar
2 teaspoons vanilla extractFor the Toppings:
1 bag (10½ ounces) miniature marshmallows
1½ cups milk chocolate chips
1 cup smooth peanut butter (don't use natural peanut butter)
1 Tablespoon unsalted butter
1½ cups Rice Krispies cerealDirections:
1. Preheat the oven to 350 degrees F. Grease a 9x13-inch pan.
2. For the brownies: In a medium saucepan, melt the unsweetened chocolate, butter and ¾ cup of the semisweet chocolate chips over medium heat. Stir occasionally while melting. Set aside and cool for 5 minutes.
3. In a medium bowl sift the flour, baking powder and salt. Set aside. In a large bowl , whisk the eggs thoroughly. Add the sugar and vanilla and whisk until well blended. Stir the melted ingredients into the egg mixture, mixing well. Stir in the dry sifted ingredients and mix well. Fold in the remaining ½ cup semisweet chocolate chips.
4. Pour the batter into the prepared pan, smoothing the surface with a spatula. Bake for 25 to 30 minutes, or until a cake tester inserted into the corner of of the pan comes out with moist crumbs.
5. Remove the brownies from the oven and immediately sprinkle the marshmallows over them. Return the pan to the oven for 3 more minutes.
6. Meanwhile, place the milk chocolate chips, peanut butter, and tablespoon of butter in a medium saucepan. Melt over low heat, stirring constantly, until completely melted. Remove from heat, add the Rice Krispies and mix well. Allow to cool for 3 minutes.
7. Spread the mixture evenly over the marshmallow layer. Refrigerate until chilled before cutting.
(Adapted from Culinary Concoctions by Peabody; originally from Buttercup Bakes at Home
by Jennifer Appel)






I just made these with a couple of modifications. 1/ I added two tablespoons of Pernagotti Cocoa ( In addition to the 10 oz of melted chocolate AND I adapted a technique from a Robert Steinberg recipe ( very excellent). I skipped the bowls and used big 3 and four quart pots. The process change I made was to add the eggs directly to the cooled melted chocolate, one at a time, and then added the sugar and vigorously stirred it for one minute to get the sugar to melt and assimilate into the chocolate with no graininess. I know this sounds insignificant but really it makes the brownies the perfect density with a layer of a very crispy top, a cake like mid layer with a thicker more fudge like middle layer with a somewhat cake,like bottom. I baked at the same temp/time and I also used a parchment lining instead of the butter or grease. I did not make the peanut butter OR marshmallow topping because I wanted to do the brownies alone first. I want to try a caramel variation of the topping with peanuts.
This is really a sensational essential recipe and the results were ridiculously delicious.So far, judging by the rapidity with which they disappear, I would say my family agrees.
Thanks, Michelle
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They look amazing. I am happy to have self made marshmallows left at home and can’t wait to use them finally. They waited for this recipe….:-) Thank you!!!
Daniela
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I made these as an Easter treat to go with brunch. They were a huge hit! My 15 year old said these were the best things I had EVER made!
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If I was in a hurry, could I use a box of brownies instead of making the brownies from scratch?
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These look soooo goooood! I’ve always wondered, wouldn’t having more eggs make the brownies more cake like, and less fudgey and chewy? Or is that not a factor in how chewy the brownies are?
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These look so good! Really want to try these!! <3
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Well I made a caramel version of these and got the most rave reviews ever! Firstly, I did use large marshmallows to accommodate the brownies. Next, I melted butterscotch chips and fleur de sel caramel with the butter. Then I mixed in rice flakes instead of krispies (just because hubby bought the wrong thing but they made a great difference)! It was runny at first but got it all on and when it cooled it was perfectly solid and ridiculously good!
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Hi I plan on making these for my boyfriend for valentines day. Will it be too sweet if I use semi-sweet chocolate chips for the brownie base instead of unsweetened? My second question is, will brownie mix from a box be just as good? If you can help that would be great!
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Michelle on February 13th, 2013 at 11:53 am
Hi Taylor, Definitely don’t use semisweet in place of the unsweetened chocolate; it will be too much. You could also use a brownie mix if you’d like (make sure it’s the right size box for a 9×13-inch pan – a lot of them are for smaller, square pans).
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Taylor on February 13th, 2013 at 9:54 pm
Thank you very much!!
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