Marshmallow Frosted Flakes Bars

Rice Krispie Treats were among my absolute favorite desserts when I was a child and are still even to the present day! My mom would prepare treats for us as an extra treat after school, which was an enjoyable surprise.

They were my top option whenever I needed to bring something for classes or bake sales. You could call me an absolute fan.

I’ve never considered using another cereal instead of Rice Krispies, but after making these, I realized that I’d been completely missing out!

These are crunchy and offer the perfect balance of sweet and salty. They are easy to whip up in a matter of minutes. They are great for bake sales, parties, or a simple sweet snack.

I was worried I might find that the frosty flakes could be soft after mixing them with the marshmallow mixture; however, the crunchiness held!

I cut the bars slightly bigger, making 12 bars instead 16 bars, because who needs small cereal treats? I sure don’t! However, you are free to cut them larger or smaller according to the person you are serving or what you prefer to serve.

A few kitchen tools you’ll need to prepare this dish include an extra-large or semi-large pot, a 9×13 baking dish parchment paper, and a solid spoon. Prepare for an exercise for your arms!

Which Butter Do I Need to Use?

Did you be aware that European butter is higher in the amount of fat in comparison to American butter?

More fat means greater flavor, and I chose to use Kerrygold’s Pure Irish Butter. It’s delicious both in taste and texture and also has a gorgeous gold hue to it.

This recipe also suggests choosing salted butter as it balances sweet flakes. Frosty flake.

What size Marshmallows are The Best?

Any size marshmallow is sure to work, but the more miniature marshmallows melt faster and result in less stirring time.

Unlike vegan ones, I’ve noticed that regular marshmallows melt more quickly.

What if I wanted this Recipe to be a little sourer?

Many people have a severe craving for sweets; if you’re seeking something less sweet, you could switch out the frosted flakes for plain corn flakes.

If you decide to swap out the salted butter, I’d suggest using butter that is not salted with only 1 teaspoon of salt instead of wholly salted butter.

How Long Can They Last?

The cereal bars can last for a minimum of one week in a lidded container. However, I’ll bet they’ll last a lot less without being consumed! The top of the container with parchment paper, so they do not stick.

Are Frosted Flakes Gluten-Free?

No Frosted Flakes aren’t gluten-free. They are coated with malt flavoring, which is gluten-free.

Some companies make gluten-free cornflakes, but that is a good option in the event of need. You can refer to the section on creating a less sugary recipe to follow the instructions for making cornflakes.

Could I Make This into a Vegan Recipe?

I have friends who are dairy-free families. And no one should be forced to live without cereal bars made of marshmallows! Miyoko’s vegan cultured butter is my top substitute for butter as well. Vegan marshmallows are available at the majority of supermarkets.

How to Create Marshmallow Frosted Flakes Bars

Step 1

Assemble your ingredients.

Prepare a 9×13 baking dish using softened butter, then cover with parchment paper. Set aside.

Step 2

Put a large pot in the oven on medium flame. Start melting the butter, then gradually add the marshmallows.

Step 3.

Stir until the marshmallows are around 90% melted. Then, remove the pot from the flame and stir until all the marshmallows have melted. This will ensure that the mix will not ignite.

It will appear like a huge bowl of marshmallow fluff after you’re finished.

Step 4

Place the cereal in the pot and mix it until all the marshmallow mix and the cereal are evenly distributed.

Step 5

The mixture should be evenly distributed in your pan. Let the bars sit for an hour before cooling. Cut the bars into 12 and place them in a lidded container.

The Marshmallow-Frozen Flakes Bars

yield: 12 Time to prepare: 10 minutes Cook time: 30 minutes Total time: 40 Minutes

These delicious marshmallow Frosted Flakes bars are the ideal sweet treat to pair with any celebration you throw!



  • 4 2 tablespoons salted butter
  • 1 bag (10oz) of mini marshmallows
  • 6 cups of frosted flakes


  1. Assemble your ingredients.
  2. Prepare a 9×13 baking dish using softened butter, then line it with parchment paper. Set aside.
  3. Put a large pot on the stove at medium temperature. Begin melting the butter, and then slowly add the marshmallows. Stir until the marshmallows have been 90% melted. Then remove the pot from the stove and stir until all the marshmallows have melted. This will ensure that the mix does not burn. Once you’re finished, it should appear like a huge pan of marshmallow fluff.
  4. Put the cereal into the pot and mix it until all marshmallows and cereal is evenly distributed.
  5. The mixture should be evenly distributed in your pan. Let the bars sit for an hour before cooling. Cut the bars into 12 and keep them in a sealed container.
Nutrition Information:


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