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

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 leftovers, that is.

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


5 from 3 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
Chocolate Ganache Frosting
  • 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. 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.

  4. 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. 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. 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.


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