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Home / Latest Posts / Recipes / Course / Dessert / Bars and Brownies / Marshmallow Brownies

Marshmallow Brownies

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By: Leigh Anne WilkesPosted: 2/14/22Updated: 2/14/22

This post may contain affiliate links. Please see disclosure policy here.

pile of marshmallow brownies

These marshmallow brownies are a combination of a fudge brownie, gooey marshmallow and chocolate frosting, guaranteed to satisfy any chocolate craving.

stack of marshmallow brownies

The Best Combo Ever!

Chocolate and marshmallow is pretty much one of the best combos ever.  One of my favorite childhood treats was to get a bowl of vanilla ice cream, cover it with chocolate syrup, and then add in a handful of marshmallows.  Heaven in a bowl.   These brownies remind me of that favorite childhood treat

These brownies are made with a fudgy brownie base that is topped with marshmallow and then covered with a delicious chocolate frosting.  Layers of yummy goodness that will quickly become a favorite dessert.

two brownies on top of each other

Ingredients Needed

  • Butter. I use salted butter, if using unsalted add in a bit more salt.
  • Sugar. For this recipe we are using granulated sugar
  • Cocoa Powder. Use unsweetened cocoa powder.
  • Eggs
  • Flour. I always use unbleached all purpose flour
  • Salt
  • Vanilla extract.
  • Mini Marshmallows
ingredients for marshmallow brownies

For the Chocolate Frosting You Will Need:

  • Powdered Sugar
  • Cocoa Powder. Unsweetened cocoa powder.
  • Milk. I like to use whole milk or even whipping cream for a richer frosting.
  • Butter. I use salted butter, if using unsalted, add a pinch or so of salt.
  • Vanilla extract
brownie frosting iingredients

How to Make Marshmallow Brownies

  • Cream butter with sugar and cocoa.
  • Add eggs one at a time and beat after each one.
  • Mix in flour, salt, vanilla
  • Spread brownie batter into bottom of greased prepared pan (9 x 13″).
spreading brownie in pan.
  • Cook at 350 F for 20-25 minutes.
  • Remove pan from oven and cover with marshmallows.
  • Put back in oven for 3 minutes or until marshmallows puff up and begin to melt. Don’t let them brown.
marshmallow brownie collage
  • Remove from oven and allow to cool before frosting.
frosting marshmallow brownies

Brownie Frosting

  • Mix together all the frosting ingredients.
  • Spread frosting over top of the marshmallow topping.

Brownie Tips and Tricks

Line your 9 x 13 pan with parchment paper to make it easier to remove brownies from pan.

Don’t overbake your brownies. You want them soft and fudgy.

How to Cut Marshmallow Brownies

Because of the warm marshmallow layer, they can be tricky to cut.  They are more difficult to cut when they are warm but they are so yummy warm! So if you don’t care what they look like, just grab a serrated knife and cut into them right out of the oven. They will taste like heaven, but they won’t be very pretty.  If you would like a nice clean cut, refrigerate them first and then cut. You can serve them chilled or room temperature.

overhead shot of marshmallow brownies on a cooling rack

Frequently Asked Questions

How to store marshmallow brownies.

They can be kept at room temperature for up to 3 days but they will last a few days longer if kept in the refrigerator. Eat them chilled or at room temperature. frozen in an airtight container for up to 3 months.
To freeze them: Place sliced brownies on a cookie sheet and freeze. Once they are frozen, put them into a freezer safe zippered storage bag or airtight container and freeze for 2-3 months..

Can I use a boxed brownie mix?

If you want to skip making the brownie part from scratch you can definitely use a brownie mix. Make sure it is one that is for a 9 x 13″ pan. Follow the directions on the back of the box. Pull the brownies out of the oven 5 minutes before the end of the cook time to add the marshmallow layer.

stack of chocolate marshmallow brownies

What Can You Put on Top of Brownies?

Peppermint Brownies. During the holidays I like to dress them up and use peppermint extract instead of vanilla and sprinkle the top of the frosting with crushed candy cane. You could also use peppermint flavored marshmallows if you can find them.

Peanut Butter Brownies. Drizzle some melted peanut butter over the top of the marshmallow layer before adding the frosting.

S’mores Brownies. Sprinkle the top of the marshmallow layer with some crushed graham crackers or graham cracker crumbs.

Candy Bar Brownies. Cut up your favorite candy bar and add sprinkle over the top of the frosting layer.

Rocky Road Brownies. Add chopped nuts to the brownie layer, or sprinkle them on top of the marshmallow layer or add them to the top of the frosting.

Be sure and follow me over on You Tube for weekly cooking demos.

If you love these marshmallow brownies, check out some of my other favorite brownie recipes:

  • Raspberry Cream Cheese Brownies
  • Small Batch Brownies
  • Lemon Brownies
  • Best Gluten Free Brownies
  • Mint Oreo Brownies
4.70 from 10 votes
stack of marshmallow brownies

Marshmallow Brownies

Recipe From: Leigh Anne Wilkes
Fudge brownies topped with marshmallow and fudge frosting.
serves: 16 brownies
Prep:15 minutes
Cook:25 minutes
Total:40 minutes
Rate Recipe

Ingredients

Marshmallow Brownies

  • 1 cup butter
  • 2 cups sugar
  • 1/2 cup cocoa
  • 4 eggs
  • 1 1/2 cups flour
  • 1/4 tsp salt
  • 2 tsp vanilla
  • 5 cups mini marshmallows

Frosting

  • 3 cups powdered sugar
  • 1/2 cup cocoa
  • 1/3 cup milk
  • 1/2 cup butter
  • 1 tsp vanilla

Instructions

Marshmallow Brownies

  • Cream butter with sugar and cocoa.
  • Add eggs one at a time and beat after each one.
  • Add flour, salt, vanilla
  • Mix together
  • Spread into bottom of greased 9 x 13 pan.
  • Cook at 350 for 20-25 minutes.
  • Remove from oven and cover with marshmallows.
  • Put back in oven for 3 minutes or until marshmallows puff up and begin to melt. Don’t let them brown.
  • Remove from oven and allow to cool before frosting.

Frosting

  • Mix all frosting ingredients together and spread over cake.

Tips & Notes:

How to Cut:
Because of the warm marshmallow layer, they can be tricky to cut.  They are more difficult to cut when they are warm but they are so yummy warm! So if you don’t care what they look like, just grab a knife and cut into them right out of the oven. They will taste like heaven, but you’ll have a nice chocolate marshmallow mess.  If you would like a nice clean cut, refrigerate them first and then cut. You can serve them chilled or room temperature.

Recommended Products

Baking Dish (9×13)
Measuring Cups
Measuring Spoons

Nutrition Facts:

Calories: 462kcal (23%) Carbohydrates: 73g (24%) Protein: 4g (8%) Fat: 19g (29%) Saturated Fat: 12g (75%) Polyunsaturated Fat: 1g Monounsaturated Fat: 5g Trans Fat: 1g Cholesterol: 87mg (29%) Sodium: 221mg (10%) Potassium: 124mg (4%) Fiber: 2g (8%) Sugar: 56g (62%) Vitamin A: 599IU (12%) Calcium: 27mg (3%) Iron: 2mg (11%)
* Disclaimer: All nutrition information are estimates only. Read full disclosure here.
Course:Dessert
Cuisine:American
stack of marshmallow brownies
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 Originally shared September 8, 2014

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  1. Bridget says

    Posted on 7/21 at 1:25 pm

    This is a fantastic recipe. My family loved the combination of chocolate with marshmallows. Really excellent. I was wondering what type of cocoa you like to use. I used Hershey’s, but I know some recipes call for Dutch processed. I’m not sure how much the flavor changes with the different cocoas available. Thank you! Bridget Marie

    Reply
    • Leigh Anne says

      Posted on 7/21 at 4:07 pm

      I usually have Dutch processed on hand but have also used Hershey’s and both work fine – so glad you enjoyed the recipe!

      Reply
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