Lucky Charms Rice Krispie Treats

Sprinkled with fun marshmallows, Lucky Charms Rice Krispie Treats are sticky-sweet St. Patrick’s Day snacks that make enough for a party! When you need some fresh St. Patrick’s Day Ideas, make a pan of these treats.

Not everything has to be bright green to be fun for St. Patrick’s Day. Sometimes, less is more! And with these little dessert bars, you’ll enjoy a slightly less-sweet taste but with the same iconic sticky texture.

Plus, they are so easy to make that your kids can make them with you.

Pin image of stacked Lucky Charms Rice Krispie Treats.

There’s nothing quite like a holiday to bring out the craftiness in people like me! Are you the same way? As soon as a new holiday gets close, you start browsing Pinterest, looking for themed desserts and crafts.

If that’s you, then you’ll really enjoy these Lucky Charms dessert bars! If you really love making things homemade, then whip up a batch of our Homemade Marshmallows without Corn Syrup. They are so easy! But you can use any marshmallows you want.

One of the best things about these dessert bars is that you can swap out the cereal for any holiday or theme.

For example, if your kiddo is into Baby Shark, use Baby Shark cereal!

Box of Lucky Charms cereal, mini marshmallows and butter.

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St. Patrick’s Day Lucky Charms Rice Krispie Treats Ingredients:

These fun little St. Patrick’s Day Lucky Charms Treats are sure to be a hit! Print the recipe below and get started making them together!

Here is what you’ll need from the store before you begin:

  • Mini Marshmallows: Since you’re going to melt them, I suggest using white so they turn a funky color.
  • Butter: For the best flavor, use real butter. Salted or unsalted won’t affect the bars.
  • Lucky Charms: This is the basis of the entire recipe. Grab a box of the real stuff, not the off-brand. It will have the best marshmallows.
  • Non-Stick Cooking Spray: Get a butter-based spray for the best flavor.
bowls of ingredients to make Lucky Charms Rice Krispie Treats

The most fun thing about this recipe is snacking on the ingredients in between mixing and pouring!

Just look at all that color! It’s a really fun dessert for St. Patrick’s Day that isn’t overly green.

The mini marshmallows mixed into the bars add even more depth and fun to them.

Lucky Charms Rice Krispie Treat mixture pressed out in a baking dish.

Cooking Tips

Here are some tips that will help you make the best St. Patrick’s Day dessert bars ever!

Use A Smaller Pan

If you want super thick rice Krispie treats, double the recipe or use an 8×8 pan, except for the cup of cereal on the top. That will remain the same unless you want less.

Check After 30 Minutes

You may not have to leave them for an hour, as they often set pretty quickly. However, I tend to let them have plenty of time to rest as they’re easier to cute and less messy that way.

A tray of cut Lucky Charms Rice Krispie Treat bars.

Mini Marshmallows Are Optional

You don’t have to add the mini marshmallows to the mixture. You can replace it with more cereal. It calls for 2 cups of mini marshmallows, so swap it for 2 cups of cereal.

Be Gentle

Don’t press the mixture down into the pan too hard, or you’ll make the treats tough. They’ll pack really tight, making them like jerky tough. Believe me…I made this mistake before. Don’t do it!

Microwave is Optional

You can make the butter and marshmallow mixture over the stuff instead of the microwave if desired. It’s just quicker to use the microwave, which is why it’s my cooking method of choice.

Can You Make Rice Krispie Treats The Day Before?

Yes, you can make these Lucky Charms Rice Krispie Treats the day before! For best results, make sure to let the Rice Krispie Treats cool completely before you seal them.

Then store your Krispie treats in an airtight container at room temperature. This will help keep them fresh and delicious for up to two days.

I like to store them in a themed St. Patrick’s Day container, it’s so much more fun.

A women's hand holding a Lucky Charms Rice Krispie Treat with a bite taken out.

If you are going to store them on multiple levels, I suggest adding wax paper in between the levels so they don’t stick together.

More St. Patrick’s Day Recipes:

As you prepare for a St. Patrick’s Day party, here are some more recipes you should make too!

Pin image of flat and stacked Lucky Charms Rice Krispie Treats.

If you are going to take them to a class party, cut them into squares and store them inside individual bags for each child. It is so much quicker when you hand them out this way.

Here is the recipe – enjoy!

Pin image of stacked Lucky Charms Rice Krispie Treats.
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Lucky Charms Rice Krispie Treats

Make the perfect dessert for St. Patrick's Day – Lucky Charms Rice Krispie Treats! They are so easy and kids love them!
Prep Time10 minutes
Cook Time2 minutes
Total Time12 minutes
Course: Dessert
Cuisine: American
Keyword: Lucky Charms Rice Krispie Treats
Servings: 12 servings
Calories: 251kcal


  • 1 Large Mixing Bowl
  • 1 9×13 Cake Pan


  • 10 cups Mini Marshmallows
  • 6 cups Lucky Charms
  • 6 tbsp Butter


  • Slice your butter into chunks and combine it with 8 cups of mini marshmallows in a large mixing bowl. Microwave for 2 minutes.
  • Immediately stir until the marshmallows are no longer chunky and the butter is fully mixed in.
  • Add the remaining 2 cups marshmallows and 5 cups Lucky Charms to the melted marshmallows and gently fold them together until the cereal and unmelted marshmallows are fully covered.
  • Spray a 9×13 cake pan with nonstick cooking spray. Add the mixture to the pan and gently spread even in the pan.
  • Sprinkle the remaining cup of Lucky Charms over the top and lightly press to ensure it sticks to the top. 
  • Let rest for about an hour or until set. Slice and enjoy!


Calories: 251kcal | Carbohydrates: 48g | Protein: 2g | Fat: 7g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 0.2g | Cholesterol: 15mg | Sodium: 195mg | Potassium: 44mg | Fiber: 1g | Sugar: 31g | Vitamin A: 683IU | Vitamin C: 5mg | Calcium: 81mg | Iron: 4mg

St. Patrick’s Day Drinks

Make any of these jello shots free of alcohol – the kids will enjoy the festive jello cups with toppings!

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Susan B

Susan B

Hi, I’m Susan! Thanks for stopping by Oh My! Creative. I like to have fun, make fun things…you know, create stuff! I love DIY, decorating and design and like any girl…shopping and lunch!
Susan B
Susan B

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