Lucky Charms Treat Bars

side view of sliced lucky charms treat bar

These Lucky Charms Treat Bars are SO fun! Loaded with gooey marshmallows, crispy Lucky Charms cereal – these are the perfect and easy little sweet treat to whip up!

I couldn’t let the month of March go by without sharing a fun St. Patrick’s Day “dessert” recipe! And this one really takes the cake. 

I remember growing up, I absolutely loved Lucky Charms. There was something about the crispy rice cereal combined with the soft marshmallows….and of course, the marshmallows always turned the cereal milk a funky color. 

And talk about deliciously sweet! Who doesn’t love to eat that kind of sweetness for breakfast when you’re just a kid?! Heck, I still love Lucky Charms today! And so does my husband. In fact, I’d say if you asked Ben, he would name Lucky Charms as his favorite cereal. 

measuring cup filled to the brim with lucky charms cereal

So needless to say, he was excited to be able to taste test this recipe. And I’m excited to be able to share it with you today! 

Why You’ll Love These Bars: 

First off, these are SO easy to whip up. They are made with only 3 ingredients (if you don’t count a pinch of salt!) and if you have these in your pantry/fridge (which you most likely do…) then you are only a little while away from eating these delightful little treats. 

These are also NO bake! Yesss! So no turning on the oven, waiting for it to preheat…none of that!

These treat bars are the perfect combination of chewy/gooey. 

overhead shot of close up of inside of gooey marshmallow treat bar

From the gooey marshmallows inside the cereal to the marshmallows that you add to the mixture, the cereal retains a slight bite whereas the marshmallows inside of each bite adds a delightful gooey texture. 

And the colors!! Listen, I love for my food to look pretty (at least for the blog, haha!) and the colors of these treat bars are just beautiful. 

Each new bite opens up to a bright and vibrant set of colorful marshmallows that is just as enticing as it is gorgeous. 

I will let you know that if you have a sweet tooth, this is the dessert for you because these are SWEET! Marshmallows. Mixed with Marshmallow cereal. Yup, super sweet. 

extreme close up of side by side sliced lucky charms treat bars

Thankfully the salted butter and extra pinch of salt helps calm down the sweetness slightly but overall, these are definitely a sweet treat! 

I love each gooey crunchy bite of these bars – so let’s get into how to make them! Spoiler – it’s super simple 😉

Ingredients You Need: 

  • Salted Butter
  • Lucky Charms cereal 
  • Mini marshmallows 
  • Kosher salt 

Best Tips for Making Treat Bars: 

Alright, let’s get into how to make these bars! 

First, I would recommend getting out all of your ingredients and setting them up. You’ll need salted butter, cereal, mini marshmallows and the pinch of salt. 

In a large pot, add the butter and let it melt on medium heat. 

Once it’s melted, add in the mini marshmallows – I used a 10 oz. bag. 

Mix mix mix until it’s a sticky gooey mixture of deliciousness. 

To this buttery marshmallow mess, you add in the Lucky Charms as well as a pinch of salt.

Now it’s time to use those biceps! Use a wooden spoon to mix all of the ingredients together until everything is fully combined. The marshmallow mixture coating the cereal should almost look like a spider web it’s so combined! A photo for reference: 

side by side photos of buttery marshmallow mixture and then the lucky charms being added

Take that off of the heat and set it aside for a moment. 

Grab your favorite 8×8 baking pan and grease it generously with baking spray. I really like to use baking spray here because it’s SO simple. It’s really important you spray the pan or else the bars will stick. 

Another tip I have that might sound crazy but actually works? Spray your hands with the baking spray! This will make spreading the treat bar mixture SO much easier and way less sticky and messy. 

straight on shot of two stacked treat bars

So – to the pan, add in the lucky charm marshmallow mixture and like I said, gently press it down using greased hands until it’s evenly distributed in the pan. 

Place in the fridge to help it set for about 1 hour.

overhead shot of gooey marshmallow pull of lucky charms bars

Once that hour is up, time to slice and enjoy! These are thick, dense and chewy. Filled to the brim with colorful marshmallow goodness. I hope you love every single bite! 

Storing Leftovers: 

These are best eaten the day of in my opinion – so they would be a great option to take to a party or feed a small group of folks! 

However, if you are planning on having leftovers, I would recommend storing them in a tightly sealed container at room temperature. They last a couple of days! 

Did you enjoy this recipe? Here are a few others you might like: 

Lucky Charms Cereal Milk Donuts 

Chocolate S’mores Rice Krispy Treats

Lucky Charms Treat Bars

These Lucky Charms Treat Bars are SO fun! Loaded with gooey marshmallows, crispy Lucky Charms cereal - these are the perfect and easy little sweet treat to whip up!

Course Dessert, Snack
Cuisine American
Keyword lucky charms, lucky charms dessert, lucky charms treat bars
Prep Time 5 minutes
Cook Time 15 minutes
Fridge Time 1 hour
Total Time 1 hour 20 minutes
Servings 9 bars
Author Haylie


  • 1/3 cup salted butter
  • 6 cups Lucky Charms cereal 
  • 10 oz. bag mini marshmallows 
  • 1/2 tsp kosher salt 


  1. Melt the salted butter in pot on medium heat. 

  2. Once melted, add in marshmallows and stir with a wooden spoon until the two are combined and gooey. 

  3. Add in the lucky charms cereal and salt and mix until they are fully covered with the marshmallow butter mixture. Mix mix mix!

  4. Remove from the heat and set aside.

  5. Grease an 8x8 baking pan with baking spray (it also helps to grease your hands as well!)

  6. Add the marshmallow mixture into the pan and then GENTLY push them down into the pan evenly to make bars. Make sure the mixture is evenly distributed throughout the pan.

  7. Place in fridge for 1 hour to let cool and set. Slice and enjoy! 

Recipe Notes

These are best eaten the day of - but if you have leftovers, store them in a tightly sealed tupperware container at room temperature. Should be good for 1-2 days 🙂 

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