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Birthday Marshmallow Cereal Treats are topped with buttercream frosting and loaded with sprinkles.

Birthday Marshmallow Cereal Treats are topped with buttercream frosting and loaded with sprinkles. They’re over-the-top in the best kind of way and perfect for just about any celebration!

This is a sponsored post on behalf of Campfire® Marshmallows. All opinions are my own. Thank you for supporting the brands that continue to make My Baking Addiction possible.

We celebrated our little babe’s 2nd birthday this month and I seriously can’t believe how quickly two whole years have flown by, yet it’s so hard to remember life before her. We had a large, kind of fussy birthday party for Elle last year, and although it was amazing, we decided to keep things simple this year with a small celebration at home.

Birthday Marshmallow Cereal Treats so festive and fun for any birthday celebration!

Even though we were keeping it small, I still wanted to make it special. Since she’s all about farm animals and barns right now, we opted for cute, farm themed invitations and decor from Minted along with loads of helium balloons. And since I am most definitely not a cake or cookie decorator, I ordered both of those items from a local bakery and they turned out every bit as amazing as I had hoped.

Although I love to cook, bake, and host friends and family, I didn’t want to be stuck in the kitchen stressing over food and a sink full of dishes during Elle’s party. Ain’t no one got time that when there’a little babe turning 2! Instead of stressing, we had small spread of food catered in from Famous Dave’s and it was just perfect. Everything was set up buffet style on our island and it was pretty delicious, so I’m definitely happy we went that route.

Birthday Marshmallow Cereal Treats are over-the-top in the best way possible! Gooey marshmallows, buttercream frosting and loads of sprinkles!

Elle’s party was not on her actual birthday, so we had a tiny celebration at home complete with Oreo Cheesecake and these adorable Birthday Marshmallow Cereal Treats. I was going for bakery-style when I whipped these up and I think I achieved just that!

Sure they may be a little over-the-top since they’re pretty huge, loaded with marshmallows and sprinkles, and topped with vanilla buttercream, but that’s what birthdays are all about. Right?

Birthday Marshmallow Cereal Treats are loaded with all the good stuff! Marshmallows, buttercream frosting and sprinkles! Who needs cake when you can have these?
I’ve partnered with Emily from Jelly Toast and Campfire® Marshmallows to create recipes to share with you in 2016!

We even created a Marshmallow Madness Pinterest board where we’ve pinning loads of delicious marshmallow recipes that are perfect for any occasion. Like these S’mores Cookie Cups and No Bake S’mores Cheesecake.

If you’re looking for more delicious birthday inspired treats, you won’t want to miss this Marshmallow Frosting or these Birthday Cake Cookies!

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Birthday Marshmallow Cereal Treats

By: Jamie
4.50 from 10 ratings
Prep: 20 minutes
Total: 20 minutes
Servings: 9 large bars
Birthday Marshmallow Cereal Treats are topped with buttercream frosting and loaded with sprinkles. They’re over-the-top in the best kind of way and perfect for just about any celebration!


  • 6 tablespoons unsalted butter
  • 2 10.5- ounce packages Campfire® Mini-Marshmallows divided use
  • 9 cups crisped rice cereal
  • cup sprinkles
  • ½ cup unsalted butter room temperature
  • 1 ½ cups powdered sugar sifted
  • 1 ½ teaspoons pure vanilla extract
  • 1-3 teaspoons milk


  • Line a 9 x 9-inch baking pan with parchment paper or foil and spray with nonstick cooking spray.
  • In large pan, melt butter over low heat. Set aside 1 1/2 cups marshmallows. Add the rest of the marshmallows to the pan and stir until completely melted.
  • Gradually add crisped rice cereal; stirring until well coated. Fold in the reserved 1 1/2 cups of marshmallows and sprinkles until thoroughly incorporated.
  • Using a buttered spatula or clean hands to firmly press the mixture into the prepared pan. Cool completely.

For the Buttercream

  • In the bowl of a stand mixer fitted with the paddle attachment, or in a large bowl with an electric mixer, beat butter on medium-high speed for about 5 minutes.
  • With the mixer on low speed, slowly add in powdered sugar, and continue beating until well blended.
  • Add in vanilla, and 1 teaspoon of milk. Mix on low speed until incorporated.
  • Beat at high speed until frosting is smooth and fluffy; about 4-5 more minutes. If your frosting is too thick, gradually add a little more milk, 1 teaspoon at a time until you reach the desired consistency.
  • Spread or pipe frosting onto cooled marshmallow cereal treats and top with festive sprinkles.


  • I cut these Birthday Marshmallow Cereal Treats into 9 large pieces. I then piped the buttercream in a zig-zag pattern using a Wilton 2a piping tip.
  • If you want the bars to be thinner, I'd suggest using a 9 x 13-inch pan instead of a 9 x 9-inch pan.


Serving: 1bar, Calories: 404kcal

Nutrition information is automatically calculated, so should only be used as an approximation.

Birthday Marshmallow Cereal Treats are topped with buttercream frosting and loaded with sprinkles. So perfect for any celebration!

4.50 from 10 votes (10 ratings without comment)

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  1. Dorothy @ Crazy for Crust says:

    These look like the prettiest things ever!!

    1. Jamie says:

      Thanks so much, Dorothy!

  2. Nicole says:

    My daughter is not a big fan of cake so I always make her something else for her birthday. I’ll have to put these crispy treats on the list for next year’s birthday!

    1. Jamie says:

      They’d be just perfect, Nicole! Thanks for stopping by!

  3. Chels R. says:

    These are just so pretty and pink and girly!!! Loving that marshmallow fluff on top. I want to sink my teeth into it!

    1. Jamie says:

      Thanks so much, Chels!

  4. Aimee @ ShugarySweets says:

    These are seriously so fun, and I hope on my birthday someone makes them for me :)

    1. Jamie says:

      Hi, Aimee! I hope so, too!

  5. Jenny Flake says:

    These are so colorful and fabulous!  Love!!

    1. Jamie says:

      Thank you, Jenny!

  6. Lisa @ Wine & Glue says:

    OMG.  My baby is turning 2 in May and I almost had to stop reading your post.  I’m in total denial!!  These treats look amazing though!  Perfect for birthdays or living in denial ;)

    1. Jamie says:

      Hi, Lisa! The time goes by so quickly, doesn’t it? Amazing though!

  7. JulieD says:

    seriously, I agree with Kristan…I’m in love with these!!!! <3 so beautiful!

    1. Jamie says:

      Thanks so much, Julie! They are so darn good too.

  8. cookbook queen says:

    Oh my good grief, these are gorgeous! So big and fluffy, which is what i LOVE!!

    1. Jamie says:

      Yeah, I’ kind of a lover of big and fluffy cereal treats as well! Thanks so much for stopping by, friend!

  9. Tori says:

    Oh my yumness! These look so delicious it’s crazy! So sweet and delish!

    1. Jamie says:

      Thanks so much, Tori! :)