Chocolate Marshmallow Brownies

These Marshmallow Brownies are baked in a sheet pan, so they’re easy to make for a crowd. A soft homemade brownie is topped with gooey marshmallows and a rich chocolate frosting.

marshmallow brownies

There are some recipes that take you to a certain place and call back specific memories, you know what I mean? This homemade marshmallow brownie recipe is one of those for me. It makes me think of all seven of my husband’s siblings home for Christmas with kids running around, playing board games, sledding on the back hill, someone warming themselves by the wood stove and all the women chatting and cooking in the kitchen trying to feed that big old crowd.


homemade brownie recipe

This brownie recipe is definitely one that feeds a crowd. Plus it is simple to make and is so stinkin’ delicious that everyone sneaks into the kitchen to try and nab the last piece. The brownie layer is moist and chocolatey with gooey marshmallows and buttery chocolate frosting to top it all off. Mmm! So good! It’s one of our family’s favorites and I know your family will love it too!

homemade brownies with cocoa powder

I’ve included two different frosting choices in the recipe. If I have cream, I always make the ganache topping. It is rich, silky and decadent. But it does take longer to make, so I’ve included a traditional chocolate buttercream frosting recipe as well. It is delicious too. Make whichever one sounds better to you, because honestly, they’re both delicious.

You will definitely want a glass of milk to go with these brownies. And be sure to wrap up any leftovers so they don’t dry out. If you have any leftovers, that is.

Enjoy this video recipe that shows you just how easy it is to make these marshmallow brownies.



5 from 4 votes
Chocolate Marshmallow Sheet Brownies

These soft and buttery homemade brownies are topped with gooey marshmallows and a delicious from-scratch chocolate frosting. It's the perfect dessert to feed to a large crowd!

Servings: 24 servings
Author: The Craft Patch
Cream together:
  • 1 cup butter or margarine softened
  • 1/2 cup cocoa powder
  • 2 cups sugar
  • 4 eggs
  • 1 1/2 cups flour
  • 1/2 teaspoon salt
  • 2 teaspoons vanilla
Top With:
  • 16 ounces mini marshmallows (one bag)
Frosting Option 1: Chocolate Buttercream
  • 1/2 cup butter
  • 1 2/3 cups powdered sugar
  • 1/3 cup cocoa powder
  • 1/3 cup evaporated milk (regular milk works too)
Frosting Option 2: Chocolate Ganache
  • 2 cups chocolate chips
  • 2 cups heavy cream
  1. Cream together butter, cocoa powder and sugar. Then add eggs, flour salt and vanilla. Mix until smooth, then spread on a greased sheet pan. 

  2. Bake at 350 degrees for 20 minutes or until a toothpick inserted in the center comes out clean. Immediately sprinkle with one package miniature marshmallows. Return to oven for 3 minutes. Cool for one hour.

  3. For Chocolate Buttercream Frosting: Whip all ingredients until smooth.

  4. For Chocolate Ganache Frosting: Gently warm heavy cream, then add chocolate chips and stir until melted and smooth. Refrigerate mixture until cold (at least two hours), then whip in a mixer with the whisk attachment until firm and fluffy.

  5. Spread frosting carefully over the marshmallow layer of the brownies. Cut into squares with a hot knife. Cover any leftovers tightly so they don't dry out.


  1. 5 stars
    I am 68 and we have been making this exact recipe since I was probably about 10 – maybe even younger. These are the best brownies for any kind of party and that is when my mom used to make them. The only difference is that we add lots of pecans and baked them in a 9 by 13 pan. The next time I make them will bake them in a sheet pan as having them thinner will be easier for people to eat!

    • Thanks so much for sharing your story Carol. It’s so interesting to hear the history of a recipe! I’ll have to try adding pecans some time. That sounds delicious!

  2. 5 stars
    These are what my Aunt Jean used to make and they are so yummy. She made the best brownies EVER!! I sure do miss her cooking and yummy deserts.

  3. 5 stars
    I think I may have found a new favorite blogger!! I used to blog 6-7 yrs faithfully mainly about quilting, sewing and grandchildren. It was called Grandmama’s Stories. I’ve thought about resuming just for the fact of journaling family memories. Even if I’m the only one to read it! It was back before IG and Pinterest was brand new. I had a little over 700 faithful followers and made so many good friends! I mainly do IG but occasionally I’ll find an old blog I still love or like today when I found your blog! I like the diversity of topics, simplicity of the projects, your exuberance, and creative ideas. Your picture captures how I read your words… Mouth wide open in Surprise, joy, and friendliness! I don’t read many blogs anymore but I think I’m adding yours my short list of new favorites. I’m a retired teacher, married to my college sweetheart for 47 yrs in Jan., 3 grown children, 6 grandchildren with one grandson with Cerebral Palsy. A lot of my concerns center around James who is now 12 yrs old. So I’m always investigating ideas for the special needs population and their caretakers. In my case, my 42 yr old daughter and husband Josh are the caretakers. They also have an adopted son RJ, 5 yrs old. Once again, my interests span a wide range from quilting, baking, crafts, gardening, DIY, special needs, autism, grandparenting tips, to preschool activities for a smart inquisitive little five ur old. I’m looking forward to reading your blog!
    My name of Jane Ellen but my online moniker is most often Gmama or Gmama Jane! Nice to meet you!


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