March 12, 2015

Cookie Sandwiches with No-Fail Marshmallow Buttercream Frosting

Two chocolate chip cookies stuffed with a no-fail marshmallow buttercream frosting made with marshmallow creme or "fluff".

So, remember when I posted my No-Fail Vanilla Buttercream recipe?

I talked about how hard it is to accurately measure dry goods (or measure exactly like the recipe creator) so I developed my recipe around a 1-pound box of powdered sugar so there’s no way to mess it up? And all you have to do is dump the whole box in the mixer?

Well, I decided I wanted to make a marshmallow cream frosting this weekend and employed the same technique.

Cookie Sandwiches with No-Fail Marshmallow Cream Frosting (seriously, no measuring required!)

I used one whole tub of marshmallow cream and one whole box of powdered sugar (no measuring!) and worked from there to arrive and a perfect marshmallow buttercream frosting!

Now, on to why I wanted to make a marshmallow frosting in the first place…

I wanted to make cookie sandwiches but knew I’d need something with a little more body and elasticity than a traditional buttercream to physically support the cookies and withstand a bite without shooting out the sides of the sammich.

Cookie Sandwiches with No-Fail Marshmallow Cream Frosting (seriously, no measuring required!)

And I wanted something slightly less toothache-y sweet since the cookies would be plenty sweet too.

Yes, I know I put way more thought into recipes than the average bear. And that’s probably weird.

Cookie Sandwiches with No-Fail Marshmallow Cream Frosting (seriously, no measuring required!)

I love this frosting. Like, I love it, love it. I can’t wait to make this for cupcakes! It’s beautiful and pipes like a dream! I don’t think it tastes like marshmallows, it’s just this fluffy, light, crisp-white frosting that is insanely delicious.

I kinda wanted to rub some on my face.

Don’t judge me.

Cookie Sandwiches with No-Fail Marshmallow Cream Frosting (seriously, no measuring required!)

This recipe was shared at Meal Plan Monday!

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Yield: 24-25 Servings


prep time: 15 minscook time: total time: 15 mins


Cookie Sandwiches
  • 48-50 chocolate chip cookies*, baked and cooled
  • No-Fail Marshmallow Cream Frosting 
  • Sprinkles (optional)
No-Fail Marshmallow Cream Frosting
  • 1 7-oz. tub marshmallow cream
  • 1 cup salted butter, at room temperature
  • 1 teaspoon vanilla extract
  • 1 1-lb. box powdered sugar
  • 2-3 teaspoons milk or cream


Cookie Sandwiches:
Flip half of the cookies upside down. Pipe frosting onto the back of the cookies going about 1/8" from the edge. Place the remaining cookies on top of the frosting to make cookie sandwiches. 

Press down slightly on the cookies until the frosting spreads to the edge of the cookies. Roll the edges of the cookie sandwiches in sprinkles if desired. Store in an air-tight container at room temperature for up to one week.

*Here's a great recipe for Chocolate Chip Cookies or you could change it up and make Peanut Butter Cookies too!

Note: I didn't bother with a piping bag and fancy tip - I just loaded up a zip-top bag and snipped a hole in the corner. And when I was done I threw the bag in the trash. Boom. Done. And I might have shot one last blast of icing straight into my mouth before I tossed the bag.

No-Fail Marshmallow Cream Frosting:
Whip marshmallow cream, butter and vanilla extract on medium speed with an electric mixer until well combined and fluffy (about 2 minutes). Add 2 teaspoons milk or cream and powdered sugar then continue mixing on medium speed until smooth. Add more milk or cream, 1/2 teaspoon at a time, if necessary until you reach your desired consistency.

Yields enough for 24 cookie sandwiches, 24 normal cupcakes (or 16 heavily frosted ones) or one 13x9 cake. If you’re making a layered cake, double the recipe to ensure you have enough.
Recipe card created using The Recipes Generator

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Cookie Sandwiches with No-Fail Marshmallow Cream Frosting! “I love this frosting. Like, I *love it* love it. It’s beautiful and pipes like a dream! It’s this fluffy, light, crisp-white frosting that is insanely delicious. I kinda wanted to rub some on my face.”


  1. How long does this recipe last, if you don't use it all at onetime??

    1. Up to one week stored in an airtight container at room temperature.

  2. This looks and sounds so said it pipes like a dream, and I was wondering if it would be good for a rose cake? Thanks!

    1. I've never iced a rose cake so I can't speak from experience but it pipes very neat and clean so I would think it would be great!

  3. Marshmallow Creme is now on the shopping list :)

  4. These look great... my family would lvoe them. :)

  5. Used this a filling for a dark chocolate cookie sandwich (think whoopie pie only more brownie like) and it was Uh..Maa..Zing!

  6. Looks delicious! I can't wait to try it. Thanks for sharing!

  7. Can sub Crisco for the butter

  8. Omg so fun and so pretty and so delish!! I cut the butter and powdered sugar a lot... but am wondering what I can use all this extra filling for. Ideas??! (Besides sticking my face in it??)

    1. I'd make some more cookies or come cupcakes! That's not true... I'd just stick it in my face :D


Hi there! While I'm not able to respond to every comment, I try hard to answer any questions that haven't been addressed in the post, recipe or in other comments. And though I may not respond to them all, I do read each and every comment and I LOVE to hear from you guys! Thanks, y'all! - Mandy