Crispy Peanut Butter Marshmallow Brownies


Crispy Peanut Butter Marshmallow Brownies are the best brownies ever – sinful, rich, gooey, and just plain good. Pour yourself a glass of milk and grab a brownie (or five).

Crispy Peanut Butter Marshmallow Brownies

Guys, I am beyond excited to share this recipe. This is probably my favorite recipe ever. If you ever need to bribe me, to impress me, or to cheer me up, this is it. This is the ultimate favorite recipe. We are talking chocolate chip brownies topped with a thick layer of gooey marshmallows then covered with a hot mess of rice crispy chocolate peanut butter mixture. Usually I only have one or two pieces then give the rest away. However, I kept going back for another. And another. And yes, another. My sweet tooth was out of control, but can you blame me? If you want decadence, keep reading. You won’t be disappointed.

The inspiration

Over the summer, my family and I visited Harper’s Ferry. As we were exploring the town, I accidentally found a mini bakery in the back of a gift shop. There in the case sat this glorious tray of brownies with the thickest marshmallow layer I had ever seen. $2 later, I walked out of there pretty smitten. Now we are talking July weather, so it was HOT outside. My brownie was half melted, my fingers were a gooey mess, and my poor camera had chocolate smudges all over the buttons, but I didn’t care. I savored every bite (mainly because it was too hot outside to eat something so rich all at once, so it lasted all day). With each bite I took mental notes so I could recreate the brownie at home.

Crispy Peanut Butter Marshmallow Brownies

The one thing that puzzled me was the marshmallow layer. How did they get it so thick? I used large marshmallows but as you can see, they aren’t quite as thick as the original. Maybe they used marshmallow fluff. It didn’t taste artificial though, so maybe it was a homemade marshmallow fluff. I’ll need to experiment more. Of course if you’re looking in your pantry right now and only have mini marshmallows, you can absolutely use them. Just note that the layer won’t be as thick.

Crispy Peanut Butter Marshmallow Brownies
Crispy Peanut Butter Marshmallow Brownies

Yields 16

Crispy Peanut Butter Marshmallow Brownies

20 minPrep Time

40 minCook Time

1 hrTotal Time

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1/2 cup (1 stick) unsalted butter
2 ounces unsweetened chocolate, chopped
1/2 cup cocoa powder
1 1/4 cup granulated sugar
1/4 teaspoon sea salt
1 teaspoon vanilla extract
1 egg
3/4 cup all purpose flour
1 1/2 cup chocolate chips, divided (1/2 cup + 1 cup)
25 large marshmallows
1/2 cup creamy peanut butter
3/4 cup rice crispy cereal


  1. Preheat oven to 350F. Line an 8x8 pan with parchment paper.
  2. In a large saucepan, melt together the butter and chocolate. Remove from the heat. Whisk in the cocoa powder, sugar, salt, vanilla, egg, and flour. Batter will be thick. Stir in 1/2 cup chocolate chips.
  3. Spread the batter into the pan and bake 25-30 minutes or until the edges pull away from the sides and a toothpick inserted in the center comes out almost clean.
  4. Once brownies are done, top with the marshmallows in a 5x5 grid. Bake for another 8 minutes or until puffed. Gently press them down to help spread the marshmallows. Cool completely.
  5. In a large bowl over a pan of simmering water, melt the remaining 1 cup chocolate chips and peanut butter. Stir in the cereal then spread on top of cooled brownies. Let the chocolate layer harden before serving.

Source: Adapted from Taste Of Home
If you liked these Crispy Peanut Butter Marshmallow Brownies, you may also like these decadent brownies:

Chocolate Covered Strawberry Brownies

Fluffernutter Swirl Brownies

Kit Kat Cheesecake Brownies

One Pot Fudgy Raspberry Cocoa Brownies

Single Serving Smores Peanut Butter Cup Brownie

Chocolate Covered Cherry Brownie Cups

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  1. I can’t even handle how awesome these look, Carla. Where are my stretchy pants? Let’s DIG IN!

  2. I need these in my life. That is all.

  3. *jaw drops*

    WHOOOOOA! Um…Carla….I love you. these brownies deserve a declaration of love. And that marshmallow layer looks PRETTY darn thick to me! gahhh now I’m gonna crave this foreverrrrr

  4. I love how unabashedly decadent these are…such gooey goodness!!

  5. Let’s make a deal…I will make you homemade marshmallow (super thick), and you send me some of these.

    I’m dreaming of a lemon version. I.die.

  6. oh these look so yummy!

  7. If this is any sign of things to come for choc+pb day I’m so excited! These look awesome.

  8. Oh my goodness! That marshmallow layer!!! These are spectacular and I can see why they must be your favorite recipe. I know a certain 13 year old boy under my roof that would go absolutely nuts if I made these for him. Which would be good, cause he would then keep me in check so I wouldn’t eat all of them myself! ; )

  9. OK, normally I’m not the world’s biggest brownie fan but I’m pretty sure these would make me change my mind. Pinning and stealing…um…I mean replicating and crediting. :) Making a shopping list now!

  10. Woah and I mean woah. Those are some serious brownies. That mallow layer is insane!

  11. I can’t even tell you how much I want one of these! I’ve been dreaming of them all week!!!

  12. I wouldn’t have cared either. All of the chocolate smudges would have been worth it. These look amazing!

  13. Holy shizz, Carla, these are magnificent! Every layer is delicious on its own but together?! Magic! I especially love that chocolatey layer of Rice Krispies on top for that crispy crunchy texture. Beautiful photos too, girl!

  14. Are the brownies itself before putting the marshmallows on supposed to be crumbly in texture? They have great flavor but I don’t understand why the texture would be that way. Can anyone with in? Perhaps the person that wrote this recipe please.!

    • There may be a few crumbs, but they shouldn’t be crumbling apart. When you make the batter, it’s a little grainy from the sugar but still brownie batter that you can still spread. Did you follow the recipe as directed or did you make any adjustments to the ingredients or directions? Did you make sure to whisk the batter so it was smooth before baking? What kind of melting chocolate did you use? When were you cutting them, were they completely cool or still warm?

  15. what does 5×5 grid mean

  16. Pavle Vidojevic says:

    I’ve recently found this website, and I adore recipes (especially brownies and cheesecakes), but i have a problem. In my country we don’t have those (quantity) cups, so if anyone could, please, tell (write) me quantity of all ingredients (in grams) for Crispy Peanut Butter Marshmallow Brownies recipe. Thanks.

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