Lucky Charms Marshmallow Treats

Lucky Charms Marshmallow Cereal Treats for St. Patrick's Day! |

I absolutely love Rice Krispie treats… I have ever since I was a kid, and I’ve never outgrown it. At some point in the 90’s, they even came out with a Rice Krispies Treats cereal! Do you remember this?! We were never allowed to eat junk cereal when I was growing up, but I distinctly remember a family vacation to the beach around the time I was 13, and when we went grocery shopping to stock the rental kitchen, my sister and I were allowed to pick out “fun” cereal. You better believe I ate that Rice Krispies Treats cereal every single day of vacation.

I adore the traditional treats made with Rice Krispies cereal, but I’ve also played around with the same concept using other cereals like Cheerios and Golden Grahams, and I put a muddy buddy spin on a version using Rice Chex. I’ve been wanting to make a version with Lucky Charms, and thought that it would be a perfectly festive way to celebrate St. Patrick’s Day!

Lucky Charms Marshmallow Cereal Treats for St. Patrick's Day! |

I used my preferred marshmallow-to-cereal ratio for these treats, simply substituting Lucky Charms for Rice Krispies. If you’re a huge fan of the colored marshmallows in Lucky Charms (admit it – they’re the best part! I totally pick them out of the cereal!), you can actually buy JUST THE MARSHMALLOWS from Can you say genius?! So feel free to add in more marshmallows if you’d like!

What was your favorite guilty-pleasure cereal as a kid?!

Lucky Charms Marshmallow Cereal Treats for St. Patrick's Day! |

One year ago: Shamrock Shake Cupcakes
Two years ago: Homemade Baileys Irish Cream
Six years ago: Braised Beef with Mushrooms and Cabernet Sauce
Seven years ago: Slow Cooker Pot Roast

Lucky Charms Marshmallow Treats

Yield: 24 treats

Prep Time: 5 minutes

Cook Time: 5 minutes

Total Time: 10 minutes

Huge, bakery-style marshmallow cereal treats made with Lucky Charms. Perfect for St. Patrick's Day!


½ cup salted butter
8 cups miniature marshmallows
10 cups (11.5-ounce box) Lucky Charms cereal


1. Grease a 9x13-inch pan; set aside.

2. Melt the butter in a large pot over medium-low heat. Add the marshmallows and stir until completely melted. Reduce the heat to low and stir in the Lucky Charms cereal.

3. Turn the mixture into the prepared pan and press into an even layer. Allow to set at room temperature until firm, 30 minutes to 1 hour. Cut into squares and serve. Store leftovers at room temperature in an airtight container for up to 4 days.


18 Responses to “Lucky Charms Marshmallow Treats”

  1. Sally on March 12, 2015 at 6:23 am

    I share your love of Rice Krispies Treats. I’ve made a version with Froot Loops – got the idea from Martha Stewart. I don’t remember if I saw it in Martha Stewart Living, but the recipe is on her web site. The recipe used Rice Krispies, Froot Loops and Cap’n Crunch. I used Rice Krispies and Froot Loops


  2. jill on March 12, 2015 at 7:30 am

    you must try using browned butter, it takes them to another level. i used the recipe from the ‘flour’ cookbook. it calls for browned butter and a vanilla bean. i have also made the martha stewart recipe with froot loops,etc sally mentions above. i think they’re called confetti squares. they are always a big hit at cookouts.


  3. rebecca on March 12, 2015 at 8:49 am

    Those look sooo amazing. Subbing Lucky Charms for Rice Krispies cereal is genius! ❤


  4. Gail on March 12, 2015 at 9:22 am

    I always add a little milk(1 tbsp) and vanilla(1 tsp) to the melted marshmallows. Makes them incredibly smooth 🙂 YUMMY!


  5. Erin @ The Spiffy Cookie on March 12, 2015 at 11:50 am

    I just made the same thing the other day! Except yours are better because they are bigger. I definitely could have used more cereal in mine since there is less surface area than with puffed rice cereal.


  6. Alissa on March 12, 2015 at 12:26 pm

    Yum! I bet browned butter would make this even better mmm!


  7. Jennifer on March 12, 2015 at 1:04 pm

    Cap’n Crunch with Crunchberries is a fav of mine, with Frosted Flakes close behind.


  8. Kristen Ann on March 12, 2015 at 1:33 pm

    My favorite cereal as a kid was captain crunch. So good. I love the colors in these rice crispie treats. I must say that when I saw the picture I visioned Joseph as a toddler eating these treats and enjoying the colors in them. :).


  9. Carly on March 12, 2015 at 1:48 pm

    They still make the cereal!!! And it’s in select stores!
    It was one of my favorites too, along with Lucky Charms and Cinnamon Toast crunch of course 🙂 These are so cute, I made them last year and they were a hit at work!


  10. Angelyn @ Everyday Desserts on March 12, 2015 at 3:06 pm

    these look fabulous! I adore rice krispie treats and lucky charms are one of my favorite cereals!!


  11. Chrissy on March 12, 2015 at 5:32 pm

    My brother and I also chose RKT cereal as our guilty pleasure! Otherwise, it was Kix or Honey Nut Cheerios. Lucky Charms were an indulgence we only snuck in at our cousins’ house because Auntie Betty allowed what mom didn’t!


  12. Kathryn on March 13, 2015 at 4:51 pm

    This idea from the Kellogg’s folks turned up in my email today
    Basically, same recipe – but put in cupcake liners and make rice krispie cake cupcakes!!!!


  13. Elizabeth @ Pineapples and Polka Dots on March 14, 2015 at 7:47 pm

    Oh my- these look amazing! I’m a big fan of lucky charms- I’ll have to give these a try!


  14. Kari on March 14, 2015 at 10:53 pm

    I used to love the rice krispy treat cereal! My mom wouldn’t let me get it very often but so good! These look really fun.


  15. Laura Dembowski on March 22, 2015 at 8:41 am

    I love Rice Krispies Treats and Lucky Charms so this is a dangerous recipe for me. I’d have to resist eating the whole pan!


  16. Brianna on October 25, 2015 at 11:13 pm

    I think I mixed mine too much all the colors or the marshmallows combined and made an ugly color but still taste good.


  17. MK on August 7, 2016 at 6:40 pm

    This recipe looks simple and delicious. Looking forward to trying it. Can someone please tell me how hard it is to clean the pot after melting marshmellows in it though? Thanks 🙂


    • Michelle on August 9th, 2016 at 1:05 pm

      I usually fill mine with soapy water and let it soak for awhile (at least an hour), and everything comes right off very easily.


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