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If you’re looking for something sweet, sticky and delicious, these Lucky Charms Rice Krispie treats might be the perfect idea. They are made with Lucky Charms cereal along with colored and white mini marshmallows, and butter. And that’s all you need – yes, with only 4 ingredients you can make this delicious Lucky Charms recipe. It’s ideal for St Patrick’s Day and is certainly colorful to attract leprechauns and maybe even a pot o’ gold your way! Its pastel shades also make it suitable as an Easter treat.

St. Patrick's rice krispies treats on a plate.

Get this leprechaun bait ready ahead of St Patrick’s Day with these easy Lucky Charms bars. They’re so good you should make two batches!

Those of you with a sweet tooth might also be interested in Bailey’s Irish Cream no bake pie or frosted Lucky Charms cookies. Other St Patrick’s Day treats include corned beef hash au gratin and Irish fusion tacos!

Lucky charms rice krispy treats on a tray for St. Patrick's Day dessert.

Why You’ll Love This

Really easy to make: There is nothing tricky at all about making Lucky Charms Rice Krispie treats, not with a recipe this simple. You only need 4 ingredients which you melt together, press into a pan and leave to set! And voilà – that’s it!
Perfectly sweet: If you have a sweet tooth, this recipe is sure to satisfy your every candy craving. It’s really sweet and sticky, making it a favorite for kids. And also you, if you have a sweet tooth!
Customizable: You can really make these St Patrick’s Day dessert bars your own by using a different cereal, different kind of marshmallows or by using optional add-ins!

St Patrick's Day Lucky Charms rice krispie treats on a plate.

Lucky Charms Rice Krispies Treats Ingredients

A complete list of ingredients and amounts can be found in the recipe card below

Lucky Charms cereal: This cereal is perfect because you get all the crunch you need along with the sweetness and texture but also those lucky charms which are colorful and fun. You can sub another cereal if you want to add your own lucky charms candies or dehydrated marshmallows (here), or opt for a generic grocery store version.
Marshmallows: A combination of white marshmallows and colored marshmallows (special Lucky Charms marshmallows (here) are cute) is best for these Lucky Charms Rice Krispie treats because that’s the most colorful option. Use white only or colorful only if you want.
Butter: This adds a rich taste to the Lucky Charms treats and helps hold the bars together when it cools. Salted or unsalted butter is fine.

Rainbow sprinkles and marshmallows on a St. Patrick's day yellow background.

How to Make Lucky Charms Treats

For more detailed instructions with weights and measurements, jump to the printable recipe card

Melt the marshmallows:  Melt the white marshmallows with the butter.
Mix in the cereal: Stir in the cereal and stir well.
Mix in the colored marshmallows: Stir them in but don’t let them melt completely.
Scoop into a pan: Transfer the marshmallow mixture into a parchment paper lined 13×9-inch baking dish and press down to distribute evenly.
Allow to set: Let the Lucky Charms Rice Krispie treats set for an hour, then cut into 12 pieces and enjoy.

A bowl of Lucky Charms cereal and St. Patrick's Day Rice Krispie treats on a yellow background.
St. Patrick's Day Lucky Charms rice krispie treats on a yellow plate.

Substitutions and Variations

Gluten free option:  If you want a gluten free version of Lucky Charms treats, make sure you choose marshmallows made with corn starch instead of wheat flour. Lucky Charms cereal and butter are both gluten free.
Different cereal mixture: Not a Lucky Charms fan? Use any other breakfast cereal you prefer and add in some candy charms or colorful candies of your choice instead.
Add-ins galore: The charm of this recipe is you can throw anything you want in there as an add-in. Possibilities include M&Ms, skittles, peanuts or pistachios, chopped chocolate, and dried fruit.

A stack of Lucky charms rice krispie treats on a yellow background.

Serving Suggestions

Main dishes: If you’re making these as part of a St Patrick’s Day feast, consider other Irish dishes too such as potato, cabbage, corned beef, and onion tacos (this fusion dish really is amazing!) or any of these unusual recipes with Guinness. Or come out of left field with something unexpected on the buffet table like homemade egg rolls! And yes, you can fill them with corned beef and cabbage!
More sweet treats: 
Celebrate St Patrick’s Day properly by also whipping up chocolate pistachio eclairs or St Patrick’s Day cookies with dip.
Drinks: It’s St Patrick’s Day so you might like to try something special like a green Irish whisky cocktail or pot o’gold jello vodka shots for luck!

St. Patrick's day Rice Krispy treats on a wooden plate.
A stack of Lucky Charms rice krispie treats on a plate.

How to Store Lucky Charms Rice Krispies Treats

Store:  Keep the Lucky Charms Rice Krispie treats in an airtight container and they should last for up to 4 days.
Freeze:  These Lucky Charms cereal treats are freezer-friendly but they’ll start to lose their flavor and texture after 6 weeks so don’t freeze them for too long.
Thaw:  They will thaw just fine on the countertop overnight. Cover them up so the leprechauns don’t come in and help themselves!

St. Patrick's Day dessert with Lucky Charms Rice Krispies bars on a yellow background.

Top Tips

Marshmallow mixture: If you can’t find colored marshmallows, you can just use the white ones. You will want some in the bars that are melted and some still fluffy and not melted, so add some early and some later on.
Get an even layer: Once you’ve pressed the melted marshmallows mixture into the baking dish, press a greased piece of parchment paper or plastic wrap on top so you can get your homemade Lucky Charms treats nice and even.

Lucky charms rice krispie treats on a wooden cutting board.

Lucky Charms Marshmallow Treats FAQs

Where can you find colorful marshmallows?

If your local grocery store doesn’t carry them, you can find them here or use colored marshmallows (also known as bunny poop!) online (here).

Can you make these less sweet?

It’s fair to say not everyone has a sweet tooth but these Lucky Charms Rice Krispie treats are aimed at those who do! You can always cut these St Patrick’s Day or Easter treats into smaller pieces!

Should you use unsalted butter or salted butter?

You can use either one. Salted butter does add a nice contrast to the strong sweetness though, so if you’re using unsalted you might want to add a pinch of salt to get the same effect.

A stack of St. Patrick's Rice Krispies bars on a plate.

Lucky Charms Rice Krispie Treats

5 from 3 votes

Lucky Charms Rice Krispie Treats

By: Bella Bucchiotti
Leprechaun bait, or Lucky Charms Rice Krispie treats, are just the ticket for St Patrick's Day dessert. These are very sweet and delicious!
Prep Time: 20 minutes
Cook Time: 0 minutes
Set Time: 1 hour
Total Time: 1 hour 20 minutes
Servings: 12


  • 6 Cups Lucky Charms cereal
  • 8 Ounces mini marshmallows, white
  • 8 Ounces marshmallows, colored or special Lucky Charms marshmallows
  • 4 Tablespoons butter


  • Line a 9×13 inch pan with parchment paper and set aside.
  • In a large saucepan, melt butter and white mini marshmallows together over low/medium heat, stirring continuously.
  • Once marshmallow mixture is melted and smooth, add in your Lucky Charms cereal and stir well until cereal is fully coated and sticky.
  • Now add in your colored marshmallows. Give a quick stir so they are incorporated but not fully melted.
  • In your prepared pan, scoop the Lucky Charm mixture in and press down until the mixture is evenly dispersed.
  • Allow to set for an hour then cut into 12 equal pieces and serve.


Calories: 192kcal | Carbohydrates: 46g | Protein: 2g | Fat: 1g | Saturated Fat: 0.3g | Polyunsaturated Fat: 0.3g | Monounsaturated Fat: 0.4g | Trans Fat: 0.003g | Cholesterol: 1mg | Sodium: 152mg | Potassium: 49mg | Fiber: 1g | Sugar: 29g | Vitamin A: 516IU | Vitamin C: 5mg | Calcium: 85mg | Iron: 4mg
Like this recipe? Rate and comment below!

These Lucky Charms Rice Krispie treats are one of the best sweet treats you can make for St Patrick’s Day. They’re also really tasty and fun to make any day of the year, especially if you have kids that want to stir (and lick the spoon) or even if you have no kids but you do have a very sweet tooth! These gooey marshmallow treats are sweet, sticky and perfect for anyone who loves candy but doesn’t want to stand over the stove making something complicated or time-consuming.

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Bella Bucchiotti

Bella Bucchiotti is a Canadian-based syndicated food, travel, and lifestyle writer, photographer, and creator at xoxoBella. She founded xoxoBella in 2015, where she shares her love for food, dogs, sustainability, fitness, crafts, outdoor adventures, travel, and philanthropy to encourage others to run the extra mile, try new recipes, visit unfamiliar places, and stand for a cause. Bella creates stress-free and family-friendly recipes for weeknight dinners and festive feasts.


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