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Marshmallow Fluff Buttercream

Thanks for sharing!

American buttercream with a marshmallow fluff twist. It tastes like a marshmallow but spreads nicely, works on layer cakes and is even good for piping! 

mixer paddle full of mashmallow fluff buttercream frosting

Have your marshmallow in frosting form! This fluffy frosting is perfect for all kinds of cakes and cupcakes.

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

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!  

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. 

mixing bowl full of white marshmallow buttercream 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I originally made this frosting to go on top of some pumpkin spice cookie bars.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 triple layer 9″ pink velvet cake. Well I tried, I used whole eggs and the color turned out more of a peach than a pink.

I filled it with blood orange curd and frosted it in a double batch of this frosting.  It tasted great but the color was just not what I wanted it to be.

cake with pink ombre effect on the sides and a pink swirl on the top

I guess I am going to have to tinker with it a bit so I can share it with you.  I just can’t bare to not share the recipe, but the color definitely leaves something to be desired! 

Anyway, the marshmallowy frosting worked great on the soft velvet cake as well.  I wanted to evoke the feeling of Easter with the pastel and marshmallows and it certainly did the trick. 

This frosting is a bright white color if you beat the butter well.  It colors great and pipes nicely too, so you could easily use it for a decorative cake.

pink ombre layer cake with edible nest and peeps topper

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. 

square of oatmeal creme pie bar on plate in front of pan of remaining bars.

The smooth buttercream is the perfect foil for the rich molasses filled oatmeal cookie bars.  They are a once you start you can’t stop treat for sure!

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.

Marshmallow Fluff Buttercream

Carlee
American buttercream with a marshmallow fluff twist. It tastes like a marshmallow but spreads nicely, works on layer cakes and is even good for piping!
4.59 from 60 ratings
Prep Time 8 minutes
Cook Time 0 minutes
Total Time 8 minutes
Course Dessert
Cuisine American
Servings 24 Servings
Calories 130 kcal

Ingredients
  

  • 1 cup butter softened
  • 2 cups powdered sugar
  • 1 tsp vanilla extract
  • 7 oz tub of marshmallow fluff

Instructions
 

  • In your mixer bowl, cream you butter until it is light and fluffy.  (Go ahead and let it go for a minimum of 2 minutes.)
  • Add in the powdered sugar, vanilla extract and marshmallow fluff. Mix on medium for about 4 minutes.
  • Get ready to have your socks knocked off.

Video

Nutrition

Serving: 1ServingCalories: 130kcalCarbohydrates: 16gFat: 8gSaturated Fat: 5gPolyunsaturated Fat: 2gCholesterol: 20mgSodium: 68mgSugar: 14g
Tried this recipe?Mention @carleecooks or tag #cookingwcarlee!
Have you marshmallow in frosting form! This fluffy frosting is perfect for all kinds of cakes and cupcakes. It is great for decorating and the marshmallow adds that bit of extra flavor that will make your taste buds sing. It is super simple to make and even easier to eat!

Thanks for sharing!

Recipe Rating




rosetta

Sunday 28th of May 2023

Have you toasted this frosting like a meringue?

Carlee

Sunday 28th of May 2023

I have not. Now I'm curious how that would go.

Jennifer Ragonese

Thursday 5th of January 2023

This is almost the same recipe as the one I use for my Whoopie pie filling - just add a little more icing sugar and vanilla - it's one of the most requested fillings for my Whoopies and I'm sure it would be so yummy on cakes or as a filling for a tiered cake.

Carlee

Friday 6th of January 2023

It would make a great whoopie pie filling! We really like it on oatmeal cream pie bars and in cookie sandwiches as well.

Wendy

Wednesday 1st of September 2021

Been making this for years! Try add about a 1/2 cup peanut butter for a fluffernutter frosting! Its delish!

Carlee

Wednesday 1st of September 2021

Now that sounds delicious!

Buckeyegirl89

Friday 23rd of October 2020

This frosting sounds lovely! Making a birthday cake for my niece, how does this frosting hold up to decorations, specifically on the cake sides?

Carlee

Sunday 8th of November 2020

It does hold up really well. You can adjust the consistency just like a standard American buttercream and use it for spreading or piping. I hope you enjoy it!

Dee Dee

Monday 25th of May 2020

This was sooo good! Not super sweet like I imagined it would be but just sweet enough! Definitely will make this again!

Carlee

Sunday 7th of June 2020

YAY! I am so glad you liked it!