Bars, Blondies & Brownies/ Desserts

Frosted Flakes Marshmallow Treat Bars

Ummmmm….so I found these ((NEW)) Cinnamon Frosted Flakes at the grocery store last week.  You might be thinking, “Yes!  Breakfast!”  But my mind went directly to thinking about what I could make using these Frosted Flakes.  Y’all know I love to use cereal in my desserts and my hubby loves a good marshmallow treat, so check out the amazing-ness I created using Frosted Flakes and just four other ingredients!  Plus, I have also discovered the secret to perfect, ooey-gooey marshmallow treat bars.  It will blow your mind.  You must read on!!!

I found Cinnamon Frosted Flakes at Wal-Mart, but you could use the regular Frosted Flakes for this recipe too, if you can’t find the new cinnamon flavored ones.  The cereal on its own smells sooooo good!  I’m a sucker for anything cinnamon though.

You make these marshmallow treat bars just like all other marshmallow treats!  Melt the butter and marshmallows on the stovetop:

I just love melting butter and marshmallows together!

So besides the gooey-ness of the melted marshmallows and butter, want to know what my secret is to the ultimate marshmallow treats??  Adding baking chips to the melted mixture right when you pull the pot off the stove!!  In my Cocoa Krispies Treats I add semi-sweet chocolate chips, but in these Frosted Flakes Marshmallow Treats, I added white chocolate chips.  And don’t worry all you white chocolate haters out there.  You can’t taste the white chocolate.  It just adds a decadence to it that will blow your mind!  Ok..that was my secret.  I was excited to share it with you.  So definitely try it out! 🙂

Frosted Flakes Marshmallow Treat Bars

Print Recipe
Serves: 30 Cooking Time: 5-minutes


  • 5 tablespoons salted butter
  • 1 (16-ounce) bag mini marshmallows, divided (about 8 cups total)
  • 1 teaspoon vanilla extract
  • 3/4 cup white chocolate chips
  • 6 cups Frosted Flakes cereal (I used Cinnamon Frosted Flakes)



Line a 9x13-inch baking dish with foil or parchment paper and spray with baking spray. Set aside.


Place a large pot on the stovetop and on medium heat, melt the butter. Once butter has melted completely, measure out seven cups of mini marshmallows (you should still have about 1/2 cup of marshmallows left in the bag---save those for the end!) and add the mini marshmallows to the melted butter. Stir the marshmallows and butter continuously, until all of the marshmallows have completely melted.


Once all the marshmallows have melted, remove the pot from the stovetop and stir in the vanilla extract. Add the white chocolate chips to the marshmallow mixture and stir the chips until they are mostly melted into the mixture. Add the Frosted Flakes to the marshmallow mixture, one cup at a time, making sure each cup is fully mixed into the marshmallow mixture before adding the next cup. When adding the sixth cup of Frosted Flakes, add the remaining mini marshmallows from the bag, into the mixture. Stir until combined. The mini marshmallows added at the end won't melt completely, which makes for a chewy, marshmallow-y treat!


Pour marshmallow treats out into prepared baking pan and gently use your hands or rubber scraper to gently distribute the mixture evenly into the pan. If I use my hands, I will spray my hands with baking spray so my fingers don't stick to the mixture.


Let bars sit at room temperature for 1-2 hours to cool completely, before slicing into desired sized slices.


Store in an airtight container at room temperature.

The hardest part about making these is waiting for the bars to cool and set before cutting into squares!

See how gooey these are??  And I love the marshmallows that are added at the end, because they only melt a little!  These are so easy to make, so don’t you dare buy those pre-made Krispie Treats!

James said these were better than Rice Krispie Treats (which are probably one of his FAVORITE desserts I make him)–so that’s telling ya something!

No-bake, easy, 5 ingredients, easy, yummy, easy…. and they’re grrrrreeeeeeeeeeaaaaattt!




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I have linked this recipe up at the following Link Parties: What’s Cookin WednesdayPin Junkie Pin PartyFantastic FridayWeekend PotluckSugar and SpiceMonday Plan Monday.  Click on the links to check out a lot of fun recipes and crafts from a ton of bloggers! So much fun!

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  • Reply
    Maria Doss
    February 7, 2017 at 10:51 AM

    That is a great secret kelly! I’m not a huge white chocolate fan as well, but sounds delicious with melted marshmallows and cinnamon cereal.

    • Reply
      February 7, 2017 at 5:41 PM

      Thanks Maria! I made these while my husband was at work and dropped them off to him when I was on my way to my friends house. He texted me a few minutes later telling me they were the best marshmallow treats EVER! So I asked him if he could tell I put white chocolate in them and he said no! So you can’t even detect the taste of the white chocolate, but get the added benefits of it being gooey and decadent! XOXO 🙂

  • Reply
    February 7, 2017 at 3:22 PM

    So I have to ask “are you my child”? Neither dad’s nor my brain works like yours . . . if I actually did any grocery shopping (lucky me your dad does it all) I would only see breakfast food and of course Tony the Tiger 🙂 Lucky for James, the firehouse and the whole family you have this “gift” that helps you see food in a completely different way than the rest of us! . . . . xoxoxo love you sweetheart xoxoxo . . . keep up all the creativity and we’ll all just keep enjoying being your taste testers!

    • Reply
      February 7, 2017 at 5:43 PM

      Hahahaha…you and Dad are both creative! We are all just creative in different ways. And I spend a lot of time thinking about different combos and trying to make something I haven’t ever seen before 🙂 XOXO Love you Momma!!

  • Reply
    Kim @ The Baking ChocolaTess
    February 8, 2017 at 3:00 PM

    Ugh…How did I miss these? They sound sinfully divine Kelly. O.M.G. 🙂 Pinning!

    • Reply
      February 8, 2017 at 5:22 PM

      Kim they are AMAZING! My husband is still talking about them lol…you totally have to make them!! XOXO 🙂

  • Reply
    Monthly Meal Plan: June | The Spiffy Cookie
    May 28, 2017 at 3:01 AM

    […] Frosted Flakes Marshmallow Treat Bars – Kelly Lynn’s Sweets & Treats […]

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