Marshmallow fluff frosting has everything you love about American buttercream with a marshmallow twist. It tastes like a marshmallow but spreads nicely, has a great texture, works on layer cakes and is even good for piping. So, whether you are looking for a great new frosting to try or you want a marshmallow cake filling, this is the recipe for you.

Close up of a mixer paddle filled with white marshmallow fluff frosting.

If you are looking for a fun way to give your buttercream a little something extra, you are in the right place. This marshmallow fluff frosting is perfect for all kinds of cakes and cupcakes.

It is great for decorating and the marshmallow fluff adds that bit of extra flavor that will make your taste buds sing. It is super simple to make and even easier to eat.

Frosting Love

By now I think we all know that I am a frosting fan.  I love to make the stuff and I really love to eat it!  

Ingredients for marshmallow fluff buttercream including butter, vanilla, powdered sugar, and marshmallow fluff.

I mean that is the whole point of making a cake, isn’t it?  I feel like it is hard to go wrong with deliciously plain old buttercream, but sometimes you want to amp it up a bit, am I right? 

The super light and fluffy white chocolate buttercream is an excellent example.  So is sweetened condensed milk buttercream. Both add a bit of something extra without taking away the things I love about American buttercream. 

So it makes sense that I would need to keep finding new ways to make buttercream even better. This marshmallow fluff frosting is a perfect example of that.

What Does Marshmallow Fluff Frosting Go With?

So many things! Pretty much anything you would use a vanilla buttercream on would go well with the frosting.

I originally made this frosting to go on top of some pumpkin spice cookie bars. The marshmallow was a great topper and played well with the warm tones of the bars. 

Recently I made a layered pink velvet cake. I filled it with blood orange curd and frosted it in a double batch of this frosting. 

It was a fun burst of childhood with the pretty color, soft cake, and fun frosting. It reminded me of a snack cake, but with epic proportions.

I decided to go with a pink ombre effect on my layer cake and I thought it turned out pretty well.  The best part is it tasted even better than it looked. 

If you want to try this super yummy frosting, but don’t want to make a big cake, try it on copycat oatmeal creme pie bars. They taste just like the Little Debbie snack, but they are in bar form so they are super simple to make. 

In fact, I think that might be my favorite use of this frosting. There is something about the rich molasses and oatmeal cookies mixed with this yummy buttercream that is extra tasty.

For a similar reason, it is perfect on a Christmas tree cheesecake. The flavor and texture just really gives off snack cake vibes.

They are nostalgic in the best kind of way. You should make some to see for yourself.

Frequently Asked Questions

How do you store marshmallow fluff frosting?

This buttercream can be stored at room temperature for two to three days.  Just make sure to keep it covered so it doesn’t form a crust.  

For longer storage, place in an airtight container in the refrigerator for up to two weeks or freeze for up to two months. Just bring the frosting to room temperature and whip before using.  

What if you don’t have marshmallow fluff?

If you don’t have a jar of marshmallow fluff or marshmallow creme on hand, you can still make marshmallow frosting. Check out my recipe for marshmallow buttercream that uses melted marshmallows instead.

If you are a frosting fanatic like me, check out my Frosting 101. It goes through the different types of frosting and links to all sorts of delicious recipes!

Close up of a mixer paddle filled with white marshmallow fluff frosting.
4.58 from 64 ratings

Marshmallow Fluff Buttercream

Author: Carlee
Servings: 24 Servings
Marshmallow fluff frosting is perfect for cakes, cookies, and more. It reminds me of the filling of our favorite snack cakes. Make a double batch to frost a layered cake, or use written for a 9×13-inch cake. We love it on oatmeal cream pie bars, or it would be amazing as a filling for whoopie pies.
Prep: 8 minutes
Cook: 0 minutes
Total: 8 minutes

Ingredients 

  • 1 cup butter softened
  • 2 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 7 oz marshmallow fluff

Instructions 

  • In your mixer bowl, cream the butter until it is light and fluffy.  (Go ahead and let it go for a minimum of 2 minutes.)
    1 cup butter
  • Add in the powdered sugar, vanilla extract, and marshmallow fluff and mix on low until incorporated. Turn the mixer to medium speed and beat for about 4 minutes.
    2 cups powdered sugar, 1 teaspoon vanilla extract, 7 oz marshmallow fluff
  • Spread on your cooled dessert or store in an airtight container until ready to use.

Video

YouTube video

Nutrition Information

Serving: 1Serving | Calories: 130kcal | Carbohydrates: 16g | Fat: 8g | Saturated Fat: 5g | Polyunsaturated Fat: 2g | Cholesterol: 20mg | Sodium: 68mg | Sugar: 14g
“Cooking With Carlee” is not a dietitian or nutritionist, and any nutritional information shared is an estimate. If calorie count and other nutritional values are important to you, we recommend running the ingredients through whichever online nutritional calculator you prefer. Calories and other nutritional values can vary quite a bit depending on which brands were used.

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4.58 from 64 votes (62 ratings without comment)

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62 Comments

  1. I have to try this…a great recipe to Pin! Thanks!

  2. I've never thought about marshmallow icing…I too am a lover of icing, and will be trying this one pronto! Thanks for sharing your recipe!

  3. I love buttercream and I have never thought about adding marshmallow fluff to it. What a great idea! Thanks for sharing at Inspiration Thursday! Have a great week!

    1. I love buttercream too! The marshmallow really adds a nice flavor and texture. Frosting is one of my favorite things to play with!

  4. Sue from Sizzling Towards 60 & Beyond says:

    You know Carlee I only started making buttercream a couple of years ago when my son got engaged and I made their engagement cake. Now I make it all the time however I love the marshmallow idea. Thanks for sharing with us at #WednesdaysWisdom. Always love your posts.

    1. I love buttercream! As a kid I loved the frosting in the can, but now I can't even look at it now that I know how easy it is to make all these different frostings that are so much better!

  5. This looks amazing, and I absolutely love marshmallows, will definitely have to try this recipe. Thank you for sharing with OMHG Wordless Wednesday Link Party. Co-host Evija, From Evija with Love xx

    1. This definitely tastes like marshmallows, so I think you'll love it!

  6. Yum Carlee! I'm a frosting addict and love trying new kinds. I'm a buttercream addict as well. Can't wait to give this one a try. Got a few of my kids birthdays coming up so this will come in handy!

    1. Me too! More frosting = more better!! I hope you love this one.

  7. Ali @ Jamhands.net says:

    Looks deeeelish 🙂

  8. The Crafting Foodie says:

    Carlee, I love marshmallow frosting, and yours sounds delicious! We're also having 90 degree weather and crazy 95% humidity, so I can't shake the summer posts just yet. I'm willing myself to make an autumn-themed dessert next week. I'll look to you for inspiration 🙂

    1. We have had a really nice break from the heat the last day or two, so that has only made me more ready. Of course it is supposed to be mid to upper 80s again next week. It has been really strange training myself to make stuff a season or holiday ahead when I can. This blogging stuff is hard work! 😉

  9. Sam Monaco says:

    Wow!! This looks so simple to make, and for sure fits the bill for cakes, cup cakes, and cookies. Just what I need for my sweet tooth. Thanks I'll pin this one for the future!!!

    1. Thank you! I hope you love it!

  10. Susan - of every moment says:

    I never thought to use marshmallow fluff in frosting – but now it really makes sense! I'm pinning both this and the White Chocolate Buttercream – but I will have to wait to try them until after I make your Brownie Mix Puppy Chow!
    So many good recipes – thank you!

    1. Thank you so much, Susan! We are headed into birthday season in my family, so we have plenty of excuses to make a lot of fun treats.

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