• Skip to primary navigation
  • Skip to primary sidebar
  • Skip to footer
  • Skip to content
Preppy Kitchen logo
  • About
    • Meet John Kanell
    • Press
  • Recipes
    • Desserts
    • Breakfast
    • Main Dishes
    • Side Dishes
    • Breads
    • Soups
    • Salads
    • Casseroles
    • Instant Pot
    • Appetizers
    • Drinks
    • Holiday
  • Cookbook
  • Shop
  • Contact
menu icon
go to homepage
search icon
Homepage link
  • About
  • Press
  • All Recipes
  • Cookbook
  • Shop
  • Contact
  • Follow us on

    • Facebook
    • Instagram
    • Pinterest
    • Twitter
    • YouTube
  • ×

    Home » Recipes » Desserts » Marshmallow Brownie

    Marshmallow Brownie

    Published: January 9, 2019 · Modified: Aug 3, 2020 by John Kanell

    This post may contain affiliate links. Please read our disclosure policy.

    If you've ever had a marshmallow brownie I bet you're hitting the Print Recipe button right now because they are GOOD! A rich chocolate brownie is topped with MOUNDS of marshmallowy fluff (you have to make your own, it's easy and so tasty) then drizzled with more chocolate. I did a swirl but some people literally flood the top with ganache, there is no wrong way to go here. Anyhow You're probably going to ant to double the batch as people will ask you to bring these to work/school/their house.

    A photo of a Marshmallow Brownie on a plate.
    4334 shares
    • Share
    • Reddit
    Jump to Recipe Print Recipe
    Marshmallow Brownie

    The topping is really just Italian meringue with one key addition. Light corn syrup makes this ultra-marshmallowy. I wish I knew the science behind this but I came across this after some experimentation.

    Can you put marshmallows in brownie mix?

    YES! The soft gooey texture and sweetness of the marshmallow pairs wonderfully with the rich brownie. Add half a bag of mini marshmallows to the prepared batter or cover the brownie with them just before it’s finished backing.

    what can you do With Marshmallows?

    Whip up a batch of marshmallow fluff! If you’re in a hurry an easy hack for a similar taste is to pile some marshmallows on top of the brownie toward the end of baking and they’ll melt in the oven. You can also broil for a few minutes.

    What Desserts Can you Make with Marshmallows?

    Ultimate s’mores with homemade marshmallows

    S’more’s cake

    Hot chocolate marshmallow cookies

    Rocky road cupcakes

    Pro tip, don’t add gelatine to your molten sugar! Feel free to experiment with flavoring the marshmallow topping and swirling extra ingredients in. This could have some peppermint for a holiday twist or a peanut butter syrup for some good old American zazz! ?  Hope you enjoy!

    Steps to Make This Marshmallow Brownie

    A photo showing steps on how to make a marshmallow brownie.

    How do you make Marshmallow Fluff Brownies?

    1. For the brownie; Preheat the oven to 350 degrees and prep a 9×13-inch baking pan with parchment paper. In a bowl, combine the eggs and sugar then mix them together. Sift the cocoa powder, flour, baking powder and salt to a bowl and give it a whisk.
    2. Combine the dry ingredients with the egg and sugar mixture. Toss in the chocolate chips and the melted butter. Add the batter to the prepped pan, smooth it out and bake for about 30 minutes.
    3. For the marshmallow; Beat the egg whites and 2/3 cup of sugar until it forms soft peaks. In a medium saucepan, add the remaining sugar, 2/3 cup of water and corn syrup, then place on low heat. Maintain at medium high heat and stir until the sugar melts and becomes clear. Heat until temperature reads 235-240F.
    4. Drizzle the sugar into the mixer (running on low) immediately once it is ready. Now run the mixer until the marshmallow is cool.
    5. For the Assembly; Once the brownie has cooled, pile the marshmallow fluff on and smooth it out using a spatula. Melt 1/3 cup of semi sweet chocolate and about 2 tablespoons of cream together.
    6. pipe the chocolate ganache all over the top and use a toothpick or a skewer to create a more marbleized pattern of swirls. Enjoy!

    If you’ve tried this marshmallow brownie then don’t forget to rate the recipe and let me know how you got on in the comments below, I love hearing from you!

    Marshmallow Brownie
    Print
    4.95 from 38 votes

    Marshmallow Brownie

    The most decadent brownie I have had. It's topped with a thick marshmallowy layer and then drizzled with more chocolate.
    Course Dessert
    Cuisine American
    Prep Time 25 minutes
    Cook Time 30 minutes
    Total Time 1 hour 5 minutes
    Servings 10
    Calories 370kcal
    Author John Kanell

    Ingredients

    INGREDIENTS:

      For the Marshmallow:

      • 8 egg whites room temperature
      • 1/2 cup water 120ml
      • 2 2/3 cups sugar 550g, divided
      • 1/4 cup light corn syrup 60mL
      • 2 tsp vanilla extract 10mL

      For the Brownie:

      • 2 cups granulated sugar 400g
      • 2 eggs
      • 4 tablespoons cocoa powder 30g
      • 1 cup flour 120g
      • 1 teaspoon baking powder 4g
      • 2 teaspoon salt 12g
      • 2 cup dark chocolate chips 350g
      • 1 cup melted butter 225g

      For the Chocolate Swirls

      • 2/3 cup semisweet chocolate 115g
      • 4 tbsp heavy cream 60mL
      • 1/4 tsp cream of tartar optional

      Instructions

      INSTRUCTIONS:

        For the Brownie:

        • Preheat the oven to 350 degrees F and prep a 9x13-inch baking pan with parchment paper.
        • In a bowl, combine eggs and sugar. Mix together.
        • Sift cocoa powder, flour, baking powder and salt into a separate bowl. Mix again.
        • Combine with egg and sugar mixture.
        • Toss in chocolate chips and melted butter.
        • Add batter to pan and smooth.
        • Bake for about 30 minutes.

        For the Marshmallow:

        • Beat the egg whites and 2/3 cup of sugar until soft peaks form. Add cream of tartar if using.
        • In a medium saucepan add the remaining sugar, 2/3 cup water and corn syrup, then place on low heat.
        • Stir until the sugar melts and becomes clear.
        • Maintain at medium high heat until temperature reads 235-240F.
        • Drizzle the sugar into the mixer immediately.
        • Add vanilla and run mixer until marshmallow is cool/tepid. 

        For the Assembly:

        • Melt 1/3 cup semi sweet chocolate and about 2 tablespoons of cream together. Set aside.
        • Once the brownie has cooled, pile the marshmallow fluff on and smooth it out using a spatula. 
        • Pipe the chocolate ganache all over the top and use a toothpick or skewer to create a more marbleized pattern of swirls. 

        Video

        Notes

        Recipe adapted from www.frederikkewaerens.com

        Nutrition

        Serving: 1g | Calories: 370kcal | Carbohydrates: 67g | Protein: 7g | Fat: 13.7g | Saturated Fat: 3g | Polyunsaturated Fat: 5.2g | Monounsaturated Fat: 4g | Cholesterol: 31mg | Sodium: 223mg | Potassium: 318mg | Fiber: 4g | Sugar: 47g | Vitamin A: 50IU | Calcium: 70mg | Iron: 2.8mg
        *Nutrition Disclaimer
        Have you Tried this Recipe? Tag me Today!Mention @preppykitchen and tag #preppykitchen!

        In the YouTube video, I used four eggs to make this brownie and it came out great, but I usually use two! 

        IF YOU LOVE THIS RECIPE TRY THESE OUT!

        Chocolate Cheesecake Brownies

        Brownie Recipe

        Hot Chocolate Marshmallow Cookies

        Rocky Road Cake

        S’mores Cake

        « Winter Wonderland White Chocolate Cake
        Mexican Wedding Cookies »

        Reader Interactions

        Comments

        1. Avatar for MalshaniMalshani says

          November 07, 2019 at 10:53 pm

          Hi John, I really love ur recepies.. but i have a doubt to ask..u some times say 1 cup of flour and 2 cup of sugar..
          so if u say about weight u say 2 cup of sugar equals 400 gs n 1 cup of flour equals 120 g? but y diffrence measurements?

          Reply
          • Avatar for jkanelljkanell says

            November 08, 2019 at 4:57 pm

            because the different substances have different weights 🙂

            Reply
        2. Avatar for Melissa CalhounMelissa Calhoun says

          January 30, 2019 at 10:22 am

          5 stars
          These were amazing good! I put a few cocoa nibs on them because I am obsessed with them – by the way that is totally your fault after making your chocolate cake, I now LOVE Cocoa nibs!!! 🙂

          Reply
        3. Avatar for CourtneyCourtney says

          January 28, 2019 at 9:46 am

          5 stars
          I made these last night and they were delightful! As you suggested in the video, I reduced the marshmallow recipe by 1/3 and they were still super fluffy, gorgeous and dramatic. I could have eaten the whole pan, so to save me from myself, I put some on plates and surprised my neighbors with a special delivery from the brownie fairy. They were a huge hit!
          Thanks for the lovely recipe.

          Reply
          • Avatar for John K.John K. says

            January 28, 2019 at 11:23 am

            Hi Courtney,

            I’m happy to hear the brownies were a hit! What will you make next?

            Best,

            John

            Reply
            • Avatar for CourtneyCourtney says

              January 28, 2019 at 12:41 pm

              I just got some 6 inch pans and will try one of your gorgeous cakes this weekend!

        4. Avatar for Kimberly RoschewskiKimberly Roschewski says

          January 25, 2019 at 9:47 am

          5 stars
          I made this using 4 eggs and made the amount of marshmallow recipe called for. I bake A LOT and even had a small bakery for a while…..this is by far one of the easiest and most impressive desserts I have ever made! Thank you!!!

          Reply
          • Avatar for John K.John K. says

            January 28, 2019 at 12:10 pm

            Hello Kimberly,

            That’s so nice to hear! 🙂 I’m happy you enjoyed the brownie!

            Best,

            John

            Reply
        5. Avatar for HaleyHaley says

          January 24, 2019 at 7:23 am

          I need to make this for my boyfriend. Marshmallows and brownies are two of his favorite things.

          Reply
        6. Avatar for JanetJanet says

          January 22, 2019 at 7:18 am

          Hi john…still wondering about the number of eggs in the brownies….thanks

          Reply
        « Older Comments

        Leave a Reply Cancel reply

        Your email address will not be published. Required fields are marked *

        Recipe Rating




        This site uses Akismet to reduce spam. Learn how your comment data is processed.

        Primary Sidebar

        Welcome to Preppy Kitchen!

        Thanks for stopping by! I’m John Kanell, a husband, dad to twins Lachlan and George, Los Angeles native, and an avid baker and cooker of all things delicious thanks to a life long education from my mother. This blog is where I share all of my kitchen creations!

        Search

        Follow Us On

        • Facebook
        • Instagram
        • Pinterest
        • Twitter
        • YouTube

        Preppy Kitchen Newsletter

        Sign up to receive recipes, recommendations and tips straight to your inbox!

        Buy My Book

        Preppy Kitchen Cookbook

        As Seen On

        As seen on Elle Décor, People, Food Network and more

        Top recipes This Month

        • A stack of peanut butter cookies on a small wooden board

          Peanut Butter Cookies Recipe

        • An Oatmeal Chocolate Chip cookie next to a glass of milk

          Oatmeal Chocolate Chip Cookies

        • Lemon bars dusted with powdered sugar on a green and white plate.

          Lemon Bars

        • A group of pink macarons on a serving tray next to flowers

          Macaron Recipe

        • A photo of a vanilla cupcake on a cupcake stand with vanilla buttercream frosting beautifully piped on top.

          Buttercream Frosting

        • A plate with multiple cake pops on it with one with a bite taken out.

          Cake Pops

        • A group of shortbread cookies. some are stacked while others are on crumpled paper.

          Shortbread Cookies Recipe

        • A cake stand with a slice of red velvet cake cut out and placed on a plate in front.

          Red Velvet Cake

        • A slice of vanilla cake on a plate in front of the cake on a cake stand.

          Vanilla Cake Recipe

        • A slice of lemon cake on a plate in front of a cake stand holding the rest of the cake.

          Lemon Cake

        Footer

        As Seen On:

        Elle Décor, People, Country Living, Better Homes & Gardens, Food Network, Woman's Day, forkly, Yummly, the Bump, Buzz Feed, Home and Family and New York magazine.

        The Brand

        • About John
        • Press

        Preppy Kitchen Logo

        Dessert Recipes

        • Cakes
        • Cookies
        • Cupcakes
        • Pies
        • All Desserts

        Main Course Recipes

        • Main Dishes
        • Side Dishes
        • Casseroles
        • InstantPot
        • Soups
        • Salads

        COPYRIGHT © 2015–2023 PREPPY KITCHEN | PRIVACY POLICY

        4334 shares