Not only is St. Patrick’s Day only a few days away, but today is actually National Cereal Day! I decided to celebrate both with these Lucky Charms Marshmallow Treats.

Lucky Charms Marshmallow Treats

Two birds, one sweet and yummy stone.

Since forever, I loved a big bowl of cereal. I grew up on non-sugary cereals like Cheerios and Rice Krispies, but I secretly loved Lucky Charms. Those marshmallows softened by milk…yum! My Dad, in fact, taught me at an early age to fill my bowl up to the very top with cereal before adding milk. No half bowls here. 😉 So when I learned that I could turn my love for Lucky Charms into marshmallow treats, it became my new favorite thing. It’s handheld cereal for on-the-go or at least that’s how I’m justifying it.

I first made these Lucky Charms Marshmallow Treats a few years ago for Malloree’s old softball team. Aptly named the Shamrock’s, Mal and I thought these would be a fun treat for after the game along with green apple Gatorade. Back then I spread the mixture out evenly on a larger rimmed metal baking sheet and used a clover cookie cutter to stamp out shamrock shaped treats. Overachiever much?

It wasn’t as easy as it sounds, but bruised palms aside, they did turn out.

Lucky Charms Marshmallow Treats

This St. Patrick’s Day I wanted to share my recipe so you can make these fun treats! Whether you’re bringing a treat in for a classroom party, packing them in your kids lunch or you just love the cereal like I do, these sweet treats will put a smile on everyone’s face.

ingredients for Lucky Charms Marshmallow Treats

To Make These Lucky Charms Marshmallow Treats You Will Need:

  • Lucky Charms cereal, which is just about a whole 20.5 ounce box
  • salted butter
  • mini marshmallows
  • vanilla extract
  • whole milk

Separate the cereal from the cereal’s marshmallows. This helps when it comes to mixing, so the warm marshmallow mixture won’t start dissolving the cute lucky charm marshmallows. It doesn’t take as long to separate them as you’d think and will make a difference in your Lucky Charms marshmallow treats.

melt butter in pot

In a large pot, melt 1 stick (1/2 cup or 8 tablespoons) butter over low heat.

add mini marshmallows

Once melted, add in all 16 ounces of the mini marshmallows.

stirring marshmallows with the butter.

Stir occasionally.

melted marshmallows

Stir often until melted.

add in vanilla and milk.

When smooth, stir in 1/2 teaspoon of vanilla extract and 1-1/2 tablespoons of whole milk.

add in the cereal portion of the lucky charms

Add in the cereal pieces to the marshmallow mixture.

quickly stir to combine.

Toss quickly in the warm marshmallow mixture.

Add in the lucky charms marshmallows

Just when the cereal is mixed in with the marshmallow mixture, add in the Lucky Charms marshmallows.

sti to combine.

Gently stir to combine.

lucky charms marshmallows mixed in with the cereal and marshmallow mixture.

Gently yet quickly toss to combine.

transfer to prepared pan

Pour the Lucky Charms marshmallow mixture into a lined 9×13 pan that has been sprayed with non-stick spray.

press into the pan.

With greased fingers, press the mixture to the corners and sides of the pan evenly. Refrigerate until set.

let cool then cut.

Then remove and cut into squares.

For another cereal version, try these Marshmallow Cereal Bars!

Lucky Charms Marshmallow Treats.

Serve with a glass of ice cold milk. Naturally.

Lucky Charms Marshmallow Treats.

Enjoy! And if you give this Lucky Charms Marshmallow Treats recipe a try, let me know! Snap a photo and tag me on twitter or instagram!

Lucky Charms Marshmallow Treats.

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Yield: 20 servings

Lucky Charms Marshmallow Treats

These Lucky Charms Marshmallow Treats are a fun twist on the classic treats. Lucky Charms cereal is mixed with a marshmallows mixture for a fun sweet treat!


  • 12 cups Lucky Charms cereal
  • 1/2 cup salted butter
  • 16 ounces mini marshmallows
  • 1 tablespoon whole milk
  • 1/2 teaspoon vanilla extract


  • Line a 9x13 pan with parchment paper leaving a couple inches hanging over the sides.
  • Measure out the cereal and separate the cereal from the cereal marshmallows.
  • Melt the butter in a large pot over low heat. Once melted, add in the mini marshmallows and stir occasionally until melted.
  • Stir in the vanilla and milk until combined. Then add in the cereal. Stir quickly and once combined, add in the cereal marshmallows. Stir quickly and transfer it into the prepared pan.
  • With greased fingers, press it into the pan and let cool completely.
Serving: 1g, Calories: 196kcal, Carbohydrates: 36g, Protein: 2g, Fat: 6g, Saturated Fat: 3g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 2g, Trans Fat: 1g, Cholesterol: 12mg, Sodium: 199mg, Potassium: 52mg, Fiber: 1g, Sugar: 21g, Vitamin A: 753IU, Vitamin C: 6mg, Calcium: 97mg, Iron: 5mg