Meatless Monday Challenge

30-Minute Lucky Charms Cookies

on March 14, 2024
last updated May 14, 2024
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These chewy Lucky Charms cookies use both the marshmallows and the cereal to bring nostalgia to every single bite. Only 30 minutes required!
Close up of Lucky Charms cookie with a bite taken out of it.

Looking for a fun new way to enjoy the sweet and crunchy multi-colored cereal? These Chewy Lucky Charms Cookies use both the cereal and the marshmallows to give you that iconic taste in every single bite.

Plus, this easy cookie recipe comes together in less than 30 minutes, requiring only simple pantry ingredients and no chilling time.

So what sets this Lucky Charms cookie recipe apart from the rest? Most other recipes just incorporate the marshmallows, but this one uses the cereal part, too. We will grind it down into a fine dust to replace half the flour in the recipe, infusing tons of flavor into each bite.

Overhead image of Lucky Charms cookies one with a bite taken out.

As an environmental scientist, I am always trying to find ways to combat food waste, and cereal is one of those things I buy on sale, thinking they’ll be a great solution to busy mornings, but then forget about the box in the back of the pantry.

So, integrating almost-expired cereal into these delicious cookies is a great way to use up that forgotten about cereal!

Green tip: Of the billions of tons of food wasted annually, 50% of food waste happens at home. Reduce your contribution to food waste by properly storing, reheating, and consuming leftovers.

Lucky Charms Cookies Ingredients

Here’s everything you need:

  • Unsalted butter.
  • Granulated sugar.
  • Egg.
  • Vanilla extract.
  • All-purpose flour.
  • Lucky Charms. Both the cereal, and the marshmallows.
  • Baking powder.
  • Salt.
all ingredients for Lucky Charms cookies, including flour, Lucky Charms marshmallows, vanilla extract, baking powder, salt, Lucky Charms cereal, butter, egg, sugar

Cookies with Lucky Charms Tips and Tricks

Prep Your Cereal for the Cookies First

The most tedious part of this recipe is separating the marshmallows and the cereal bits of your Lucky Charms. I love getting my toddler involved and making it like a game—who can get the most marshmallows in 30 seconds?

You’ll need ¾ cup of the marshmallows. Add 1 ½ cups of the cereal without the marshmallows to a high-powered blender or food processor and blend on high until it breaks down into a fine dust.  

You’ll need exactly ¾ cups of the cereal dust, which usually comes from 1 ½ cups of whole cereal, but it may vary slightly, so make sure you measure it once it is ground up.

Bowl of Lucky Charms marshmallows only, and second bowl of ground up cereal.
Separate the marshmallows from the cereal and blend the cereal until turns into a fine dust.

How to Make Lucky Charms Cookie Dough

This is a super simple one bowl recipe, but in order to easily combine your ingredients and make the perfect cereal cookies, there’s an order in which you should add things.

Start by creaming your butter and sugar together. It’s imperative that your butter is softened.

The creaming process may take up to 5 minutes with your hand mixer on high. You want it smooth and aerated.

Next, add your egg and vanilla extract and beat again until well combined. Then comes the flour, ground-up cereal, baking powder, and salt. Mix again until the dough is nice and smooth.

Set a handful (just under ¼ cup) of the marshmallows aside and fold the rest into the dough with a rubber spatula.

Adding granulated sugar to a large mixing bowl with softened butter.
Start by creaming the butter and sugar together.
Cracking an egg into a mixing bowl with creamed butter and sugar and vanilla extract.
Add the egg and vanilla extract and mix to combine.
Adding flour and ground up cereal into cookie dough.
Mix in the flour, ground-up cereal, baking powder, and salt.
Adding Lucky Charms marshmallows to cookie dough.
Set a handful of marshmallows aside and fold in the rest.

Shape and Bake Your Cereal Cookies

Now that your Lucky Charms cookie dough is ready, it’s time to shape your cookies. This cookie dough recipe will be enough to make about 10 roughly-equal sized cookies.

I like to use a large cookie scoop to shape my cookies because it is a slightly sticky dough. Alternatively, you can use wet hands to roll your cookie dough into balls, using about 2 tablespoons of dough for each cookie.

Bake them on the top rack at 350°F for 13-16 minutes until firm (the edges may start to brown as pictured). While they are still hot, push the extra marshmallows into the top of the cookies.

Lucky Charms cookie dough lined up on a baking sheet.
Just baked cookies on a baking sheet straight out of the oven.

How to Properly Store Lucky Charms Cookies

These cereal cookies will last for 5-7 days at room temperature or up to three weeks in the fridge when covered or stored in an airtight container.

Quick tip: Storing your cookies with a piece of bread will keep them softer and chewier. This is the perfect use for the end piece!

These cookies do tend to firm up within a few days of storing them. If you want them to stay on the soft and chewy side, store them in the container with a piece of bread. Believe it or not, moisture from the bread stops the cookies from drying out.

You can also freeze the cookies once they’re baked for up to a year, but I highly recommend freezing the unbaked dough instead. More on that below.

Six just-baked Lucky Charms cookies, one with a bite taken out.

Freezing Your Cookie Dough for Later

If you want freshly baked cookies at the drop of the hat, you can freeze some or all of the cookie dough! In the freezer, the unbaked cookie dough will last up to a year.

Shape the cookie dough into your cookies and store them in a freezer safe storage bag (consider reusable storage bags for a more sustainable option!). You can bake them on a lined baking sheet directly from the freezer.

You’ll need an extra minute or two of baking time when you’re baking them out of the freezer—just keep your eye on them!

Want to sharpen your kitchen skills?

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Why this is the Best Lucky Charms Cookie Recipe

  • It utilizes ALL of the cereal. It’s not only the fun colored marshmallow charms that give this cereal their nostalgic taste! This cookie recipe uses both the cereal and the marshmallows to really capture that Lucky Charms taste in every bite.
  • It’s super simple. Only 7 simple pantry ingredients and one bowl required.
  • They’re quick! These cookies don’t require any chilling time and bake in about 15 minutes.

If you’re loving these Lucky Charms cookies and are looking for more fun ways to use your breakfast cereal, check out this Cinnamon Toast Crunch Cheesecake and Fruity Pebbles Pancakes.

Close up of Lucky Charms cookie with a bite taken out of it.

30-Minute Lucky Charms Cookies

5 from 2 votes
Marley Goldin
These chewy Lucky Charms cookies use both the marshmallows and the cereal to bring nostalgia to every single bite. Only 30 minutes required!
Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Servings 10 cookies


  • ¾ cup Lucky Charms marshmallows
  • ¾ cup ground up cereal, without the marshmallows (about 1½ cup of cereal before blending)
  • ½ cup softened unsalted butter (½ cup butter = 1 stick)
  • ¾ cup granulated sugar
  • 1 large egg
  • 1 teaspoon vanilla extract
  • ¾ cup all-purpose flour
  • ½ teaspoon baking powder
  • ½ teaspoon salt


  • Preheat the oven to 350°F and line 2 large baking sheets with parchment paper or reusable baking mats.
  • Separate the marshmallows from the cereal. Collect ¾ cups of the marshmallows and about 1 ½ cups of the cereal without marshmallows. Set the marshmallows aside and use a food processor or high-powered blender to grind the cereal up into a fine dust. You will need ¾ cup of the ground cereal.
    Cereal that has been ground up into a fine dust.
  • To a large mixing bowl, add softened butter and sugar. Use a hand mixer on high to cream together until light and smooth (about 2-3 minutes).
    Softened butter and granulated sugar creamed together.
  • Add the egg and vanilla extract and use your hand mixer on low to combine.
    Creamed butter and sugar mixed with egg and vanilla extract.
  • Add the ground up cereal, flour, salt, and baking soda and mix to combine, careful not to overbeat. Use a spatula to scrape any flour off the sides of the bowl and integrate it into your dough.
    Cookie dough made with crushed up Lucky Charms cereal.
  • Set aside a handful of marshmallows and use a rubber spatula to fold the rest into the dough to combine.
    Lucky Charms cookie dough with extra Lucky Charms marshmallows on the side.
  • Use a large cookie scoop or 2 heaping tablespoons of dough to form your cookies, adding them to the prepped baking sheets. Leave at least an inch of space in between each cookie for minor spreading.
    6 shaped Lucky Charms cookie dough balls ready to bake.
  • Bake for 13-16 minutes on the top rack. Remove from the oven and while they are still hot, push the extra marshmallows into the top. Allow to cool and enjoy!
    Lucky Charms cookies fresh out of the oven with marshmallows pushed into the top.

Pro Tips

  • Make sure you measure the cereal dust after it’s ground up. Usually, you will get ¾ cup ground-up cereal from 1 ½ cup of whole cereal, but the amount tends to vary slightly. 
  • Love cereal? I’m sure you’ll love this collection of my best recipes using cereal!


Course Dessert
Cuisine American
Keyword 30 Minutes or Less, Cookies, Lucky Charms Cookies, Recipes Using Cereal
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5 from 2 votes (2 ratings without comment)

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