Lucky Charms Rice Krispie Treats are a fun and colorful twist on the classic marshmallow snack. These treats combine crispy rice cereal with gooey marshmallows and a handful of vibrant Lucky Charms marshmallows for a sweet, crunchy, and chewy mix that’s hard to resist. The little rainbow-colored marshmallow shapes add a pop of color and a bit of extra magic to every bite.
I love making these treats because they bring back childhood memories and always brighten up snack time. They’re super easy to pull together, and I like to press them into a pan while the marshmallows are still warm and soft to get the perfect chewy texture. I find that the colorful marshmallows never fail to make everyone smile, especially kids or anyone young at heart!
These treats are great as a party snack, lunchbox surprise, or just a quick sweet fix when you need something delicious but simple. I like cutting mine into fun shapes or squares and sharing them with friends. No matter the occasion, Lucky Charms Rice Krispie Treats always bring a little extra joy and sweetness to the day.
Key Ingredients & Substitutions
Crispy Rice Cereal: Classic Rice Krispies work best for that perfect crunch. You can try other puffed rice cereals, but the texture might change a bit. For a gluten-free option, check the cereal label to be sure.
Mini Marshmallows: Mini marshmallows melt quickly and give that gooey texture. If you can’t find mini, regular marshmallows chopped into smaller pieces are a good substitute.
Lucky Charms Cereal: This adds colorful marshmallow shapes and extra sweetness. If you want less sugar, use fewer Lucky Charms or swap with another fun marshmallow cereal.
Butter: Unsalted butter helps melt marshmallows smoothly and adds flavor. You can use margarine but avoid oil since it doesn’t provide the same richness or help with marshmallow melting.
How Can I Prevent Lucky Charms Marshmallows from Melting or Breaking?
It’s easy for the colorful Lucky Charms marshmallows to melt or lose their shape if mixed too forcefully or heated too long. Here’s how to keep them looking great:
- First, melt your marshmallows and butter gently over low heat until smooth.
- Remove from heat immediately once melted; don’t overheat or cook further.
- Stir in crispy rice cereal first, then fold in Lucky Charms cereal gently with a spatula.
- Mix only until coated, avoiding aggressive stirring to keep marshmallow shapes intact.
- Press the mixture carefully into the pan using a buttered spatula or parchment paper to avoid squashing marshmallows too much.
This way, your treats will stay colorful and fun, with that perfect chewy crunch.

Equipment You’ll Need
- 9×13-inch baking dish – I recommend this size for even layers and easy cutting.
- Large pot – perfect for melting butter and marshmallows without spilling.
- Spatula or rubber scraper – helps spread the mixture smoothly into the pan.
- Wax paper or butter for greasing – prevents sticking and makes cleanup easier.
Flavor Variations & Add-Ins
- Mix in chocolate chips or M&Ms for extra sweetness and melty goodness.
- Add some chopped nuts like peanuts or almonds for crunch and flavor.
- Use different marshmallow cereals or add a handful of colorful sprinkles for extra fun.
- Swap out part of the Lucky Charms with Fruity Pebbles for a different flavor and texture.
Lucky Charms Rice Krispie Treats
Ingredients You’ll Need:
- 6 cups crispy rice cereal (such as Rice Krispies)
- 1 (10 oz) bag mini marshmallows
- 4 cups Lucky Charms cereal (including marshmallows)
- 3 tablespoons unsalted butter
- Optional: cooking spray or butter for greasing the pan
How Much Time Will You Need?
This recipe takes about 10 minutes to prepare and mix, and then about 1 hour to cool and set at room temperature before cutting and serving.
Step-by-Step Instructions:
1. Prepare Your Pan:
Grease a 9×13-inch baking dish lightly with butter or cooking spray to prevent sticking. Set it aside while you make the treats.
2. Melt Butter and Marshmallows:
In a large pot over low heat, melt the butter slowly. Add the mini marshmallows and stir continuously until they are completely melted and smooth. Be careful not to overheat or burn the mixture.
3. Mix in Cereals:
Remove the pot from heat. Gently stir in the crispy rice cereal and Lucky Charms cereal until the marshmallow mixture evenly coats all the cereal. Mix carefully to keep the colorful marshmallow shapes intact.
4. Press and Set:
Immediately transfer the mixture to your prepared baking dish. Using a buttered spatula or a piece of wax paper, press the mixture firmly and evenly into the pan. Allow it to cool and set at room temperature for about 1 hour.
5. Cut and Serve:
Once set, cut your Lucky Charms Rice Krispie Treats into squares or fun shapes. Enjoy your sweet, crunchy, and colorful snack!
Can I Use Frozen Marshmallows for This Recipe?
It’s best to use fresh marshmallows for melting. If you have frozen marshmallows, let them thaw fully at room temperature before using to ensure they melt evenly.
Can I Make Lucky Charms Rice Krispie Treats Ahead of Time?
Yes! These treats store well at room temperature in an airtight container for up to 3 days. For the freshest texture, enjoy them within the first day or two.
How Can I Keep the Lucky Charms Marshmallows From Melting Too Much?
Mix the cereal in gently and remove the pot from heat before adding Lucky Charms to prevent the colorful marshmallows from dissolving or losing shape.
What’s the Best Way to Store Leftovers?
Store leftovers in an airtight container at room temperature. Avoid refrigerating, which can make them hard and less chewy.
