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These fun Lucky Charms Treats are just like Rice Krispie Treats but made with Lucky Charms cereal. Bright colorful marshmallows combined with the buttery crunch of the toasted oats cereal. They are the perfect way to celebrate St. Patrick’s Day, a delicious after-school snack, and are perfect for school parties!

And if you want a rainbow or unicorn treat for a themed party these are just what you are looking for!

two squares of these lucky charms Rice Krispie treats

Who doesn’t love gooey marshmallows? These treats are a lucky twist on Rice Krispies Treats!

Instead of using puffed rice, you can use just about any type of cereal to create these delicious snacks!

Lucky Charms Cereal Treats are made with toasted oat cereal and fun marshmallow bits combined to make a fun and festive treat for any occasion. They are so vibrant– they’re a party just waiting to happen!

Just keep in mind these treats are a little more crunchy in texture than traditional Rice Krispie Treats, but just as ooey gooey and magically delicious! 

Ingredients in the recipe

Picture of ingredients for Lucky Charms treats - marshmallows, butter, vanilla extract, and Lucky Charms cereal.

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

  • Lucky Charms Cereal: You can use the original lucky charms (one of my favorite cereals) for a bright colorful treat. For St. Patrick’s Day use the St. Patrick’s Day (all green and gold) Lucky Charms.
  • Marshmallows: You can use regular or mini marshmallows. I go with the mini because I like to use a cup of unmelted mini marshmallows in with the treats.
  • Butter: I use salted butter for my bars. It gives a hint of saltiness that goes well with all the sweetness. If you want to control the salt, use unsalted butter and ¼ teaspoon of salt, if desired.
  • Vanilla extract: This adds another layer of delicious flavor.

How to make lucky charms treats:

This is a super simple recipe to make! It is a little on the sticky side, but it is well worth it for the amazing treat you are going to get! It’s a pretty straightforward recipe you will make again and again.

Be sure to see the recipe card below for exact ingredients and instructions!

  1. Prepare the Pan: Butter or line a 9 X 9 baking pan with parchment paper so that it hangs over the side for easy removal. Then set it aside.
  2. Melt the Marshmallows: In a saucepan over low-medium heat, melt butter and add in the marshmallows (reserving 1 cup of mini marshmallows).

    Melting marshmallows and butter in a saucepan. Then adding in vanilla.
  3. Keep Stirring: Keep stirring as the marshmallows melt slowly on low. When they are fully melted, remove from heat and quickly stir in the vanilla extract.
  4. Pour in Cereal & Mini Marshmallows: Quickly pour in the cereal and that cup of extra marshmallows into the melted marshmallows. 
  5. Mix: With a spatula, stir until the cereal is coated with the marshmallow mixture.

    Adding lucky charms cereal and mini marshmallows to melted marshmallow mixture and stirring together.
  6. Press into Pan: Pour the mixture into the buttered 9 X 9 pan. Gently press the mixture into the baking pan with the back of the spatula. You can also use your hands (buttered or sprayed with cooking spray) or the butter side of the butter wrapper.
  7. Let Cool & Enjoy: Let them cool and set (firm up). Then slice and enjoy all the yum!

Tips

  • Use fresh ingredients. It is so important that your marshmallows are fresh. They will not melt properly if they are old. Also, if the cereal is stale the treats will taste stale as well. So make sure you check the dates!
  • Hold out a cup of mini marshmallows: Adding the whole marshmallows give some extra fluff to the bars. Pillowy marshmallow bits just give it something extra!
  • Pan Size: This recipe makes a nice thick bar. If you want a thinner bar use a 9 X 13 dish.
  • Prevent Sticking: Make sure to use parchment paper or butter the dish well to prevent the gooey bars from sticking to the pan.
  • Slightly wet or buttered fingers before pressing bars into the prepared pan. This will make it easy to press down and will prevent it from sticking to your hands. You can also use nonstick spray or butter. If you don’t want to use your hands you can spray a spatula or use the stick butter wrapper to press gently press them down.
  • Clean edge: To have a nice clean edge cut the bars on all sides. The marshmallow settles around the outside a bit as it sets. If you are serving for a party, this makes for a pretty presentation.
  • To make them Extra Festive: Save a few marshmallows from the cereal for garnish. Gently press them onto the top for even more color. You can also put sprinkles on top as well.
Sliced Lucky Charms treats on a wooden tray.

Frequently Asked Questions:

How many marshmallows do I need?

To make this recipe you will need a 16-ounce bag of mini marshmallows. This is about 9 cups.

Can I use large marshmallows?

Yes. However, I prefer the mini ones as they melt faster and seem a little easier to manage. Just keep in mind that you need to replace one cup with mini marshmallows for the inside of the treat (if desired). Or just melt all 16 ounces of the large ones, if you don’t have mini ones.

Can I make Lucky Charms Marshmallow Treats ahead of time?

Yes! Make sure you keep them in an airtight container. I would suggest you wait to cut them into bars before serving. They are most delicious on the 1st or 2nd day and are freshest if eaten within 3 days. But will last up to 5 days at room temperature.

Are Lucky Charms Treats Gluten-Free?

Yes! Lucky Charms cereal is gluten-free. You will just need to check the marshmallow brand that you buy to be sure they are gluten-free as well.

What is in Lucky Charms Cereal?

Luck Charms cereal is made with frosted oats and colored marshmallows. The marshmallows look like stars, hearts, clovers, blue moons, horseshoes, rainbows, red balloons, and unicorns.

Variations of St. Patrick’s Day Lucky Charms treats

  • If you are looking for something for St. Patrick’s Day on March 17th, these are just the thing you need for your celebration! Grab a box of the green St. Paddy’s Day-themed Charms and you have St. Patrick’s Day Lucky Charms Treats.
  • There is also a honey clover flavor to try.

    Green and gold lucky charms treats.
  • Festive Colors: Want more color? Add green food coloring or the color you want for your fun treats.
  • Chocolate Lucky Charms: You can also get a St. Patrick’s Day edition in chocolate as well as a chocolate haunted edition of lucky charms for the perfect Halloween sweet.
  • Dipped Cereal Bars: Try dipping the bars in white chocolate or milk chocolate. You can also try colored melting wafers to highlight the holiday color.

Honestly, this Lucky Charms Rice Krispies Treats recipe will work with almost any cereal. So give different ones a try.

Storage instructions

Storage: Store the treats in an airtight container at room temperature for up to 5 days. I like to line my container with parchment or wax paper as these treats are quite sticky on the bottom.

You can keep them in the refrigerator for up to 10 days. Just remove them to come to room temperature so they are not too hard to eat.

Freeze: These lucky charms bars can also be frozen. Wrap them tightly in plastic wrap, place them in freezer Ziploc bags, and freeze for up to a month. Remove to thaw before serving.

Lucky Charms Marshmallow Treats on a cutting board with Lucky Charms cereal scattered in the background.

More St Patrick’s recipes to try

More sweet recipes you may love

Lucky Charms Treat cut and stacked on a mini cake stand with milk and a vibrant rainbow hand towel in the background.

I hope you enjoy these magically delicious treats! They are sure to bring you lots of luck, my friends!

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Two stacked lucky charms treats stacked on a wooden tray.
Recipe
5 from 11 votes

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Lucky Charms Treats

Prep Time: 5 minutes
Cook Time: 5 minutes
Cooling Time: 1 hour
Total Time: 1 hour 10 minutes
Servings: 16 – 2 inch bars
Author: Nikki Lee
Lucky Charms Treats – Just like a Rice Krispie Treat, but made with Lucky Charms cereal. Bright colorful marshmallows combined with the buttery crunch of the toasted oats cereal make the perfect sweet treat!

Ingredients 

  • 6 Tablespoons butter
  • 16 ounce bag mini marshmallows, divided (reserve 1 cup)
  • 1 tsp vanilla extract
  • 7 cups Lucky Charms Cereal

Instructions

  • Prepare the Pan: Butter or line a 9 X 9 baking pan with parchment paper so that it hangs over the side for easy removal. Then set it aside.
  • Melt the Marshmallows: In a saucepan over low-medium heat, melt the butter and add in the marshmallows (reserving 1 cup of mini marshmallows).
  • Keep Stirring: Keep stirring as the marshmallows melt slowly on low. When they are fully melted, remove from heat and quickly stir in the vanilla extract.
  • Pour in Cereal & Mini Marshmallows: Quickly pour in the cereal and the 1 cup of reserved marshmallows.
  • Mix: With a spatula, stir until the cereal is coated with the marshmallow mixture. You will want to work quickly as the marshmallow mixture will set up quickly.
  • Press into Pan: Pour the mixture into the buttered 9 X 9 pan. Gently press the mixture into the baking pan with the back of the spatula. You can also use your hands (buttered or sprayed with cooking spray) or the butter side of the butter wrapper.
    Don't pack the mixture down to hard as the bars will be tough and not light and fluffy.
  • Let Cool & Set: Let the bars cool in the pan and set up at room temperature.
  • Cut & Enjoy: Cut into 2 inch square bars or desired size. Enjoy!

Notes

✱ Nikki’s Tips

  • Use fresh ingredients. It is so important that your marshmallows are fresh. They will not melt properly if they are old. Also, if the cereal is stale the treats will definitely taste stale as well. So make sure you check the dates!
  • Hold out a cup of mini marshmallows: Adding the whole marshmallows give some extra fluff to the bars. Pillowy marshmallow bits just give it something extra!
  • This recipe makes a nice thick bar. If you want a thinner bar use a 9 X 13 dish.
  • Prevent Sticking: Make sure to use parchment paper or butter the dish well to prevent the gooey bars from sticking to the pan.
  • Slightly wet fingers before pressing bars into the prepared pan. This will make it easy to press down and will prevent it from sticking to your hands. You can also use cooking spray or butter. If you don’t want to use your hands you can spray a spatula or use the stick butter wrapper to press gently press them down.
  • Clean edge: To have a nice clean edge cut the bars on all sides. The marshmallow settles around the outside a bit as it sets. If you are serving for a party, this makes for a pretty presentation.
  • To make then Extra Festive: Save a few marshmallows from the cereal for garnish. Gently press them onto the top for even more color. You can also put sprinkles on top as well.

Nutrition Information

Serving: 1bar Calories: 157kcal (8%) Carbohydrates: 28g (9%) Protein: 2g (4%) Fat: 5g (8%) Saturated Fat: 3g (19%) Polyunsaturated Fat: 2g Cholesterol: 11mg (4%) Sodium: 182mg (8%) Fiber: 1g (4%) Sugar: 16g (18%)

Nutritional Disclaimer

Soulfully Made is not a dietician or nutritionist, and any nutritional information shared is only an estimate. We recommend running the ingredients through an online nutritional calculator if you need to verify any information.

©️Soulfully Made

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Originally posted on March 16, 2018, updated on February 25, 2024.

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24 Comments

    1. Thank you, Neha! I love these too. I also get so excited when the St. Patrick’s Day edition of Lucky Charm’s hits the stores. I have my box ready to make with for my family this year.

  1. 5 stars
    Just made these Lucky Charms Treats for my kids and they were a huge hit! The marshmallowy crunch is pure magic, bringing a smile to everyone’s face.

    1. Thank you, Holley! I always make them for my granddaughter for St. Patrick’s Day or when she is wanting a unicorn themed snack.

  2. 5 stars
    Love this Lucky Charms Treats recipe, looks so fun and yummy!!! will make it with the kiddos. Thanks for sharing 🙂

  3. These are so fun and festive! We love rice krispie treats, so of course we ate he whole pan in two days! Making another batch for our neighborhood kids. Thank you!

  4. I have always loved Lucky Charms cereal and this is one recipe I need to try out. Thanks for sharing at #HomeMattersParty

  5. I used to love treating myself to a bowl of lucky charms when I was in high school. We had it in our cafeteria. I never would have thought to use it this way. You’re so creative.