Rainbow Rice Krispie Treats

Every year around St. Patrick's Day, I love whipping up something fun for my kids that feels a little magical. That's where these Rainbow Rice Krispie Treats come in! Not only do they look bright and festive, but they also bring a playful twist to classic marshmallow cereal bars. The colorful mix instantly screams celebration and turns an ordinary afternoon snack into a lucky little surprise.

Instead of sticking with the usual cereal, I mix things up and create these Lucky Charms Fruity Pebbles Rice Krispie Treats. First, the Lucky Charms add pops of color and those iconic marshmallow pieces. Then the Fruity Pebbles step in and pack every bite with fruity flavor. Together they create a fun rainbow cereal treat that tastes just as exciting as it looks.

Of course, texture matters just as much as flavor. These gooey Rice Krispie treats come out soft, chewy, and loaded with marshmallow goodness. Each bite delivers a perfect balance of crispy cereal and sweet, sticky marshmallow. Plus, the fruity cereal adds a bright flavor that takes these far beyond traditional cereal bars.

Whenever St. Patrick's Day rolls around, these treats quickly become part of our celebration. I set out a tray of these St. Patrick's Day Rice Krispie treats and watch the kids light up when they see the colorful cereal and marshmallows. They feel festive, playful, and just a little magical, which makes them perfect for the holiday.

Even better, these Rainbow Rice Krispie Treats come together quickly and make a fun dessert to share. Whether you want a cheerful after school snack, a colorful party treat, or a sweet surprise for the kids, this recipe delivers every time. One batch disappears fast in our house because everyone grabs a piece the moment they see them!

Jump to:

Ingredients
Instructions
Equipment
Storage
FAQ
Want More Fun Dessert Ideas?
Need Dinner Too?
📖 Recipe
💬 Comments

Ingredients

Lucky Charms Cereal
Fruity Pebbles Cereal
Salted Butter
Mini Marshmallows
Non-Stick Cooking Spray (to grease the 8x8 pan)

See recipe card for quantities.

Instructions

Step 1: In a large pot over medium heat, melt the butter and marshmallows, stirring continuously so the mixture does not stick or burn.

Step 2: Add the Lucky Charms and Fruity Pebbles and stir until the cereal is evenly coated with the melted marshmallow mixture.

Step 3: Generously grease an 8x8 baking dish, gently press the mixture evenly into the pan (too much will make them hard), and gently press a few extra Lucky Charms marshmallows on top if desired.

Step 4: Let the treats cool for about 30 minutes, then cut into squares and enjoy!

Equipment

Large pot or saucepan
Wooden spoon or silicone spatula
Measuring cups
8 x 8 baking dish
Nonstick spray or butter (for greasing the dish)
Knife (for cutting the bars)

Storage

Store Rainbow Rice Krispie Treats in an airtight container at room temperature. For the best flavor and texture, enjoy them within 2 to 3 days while they are soft and fresh. Do not refrigerate or freeze, as colder temperatures can make the treats firm and less gooey.

FAQ

Can I use only one type of cereal instead of both Lucky Charms and Fruity Pebbles?

Yes! You can easily customize these treats. Use only Lucky Charms for a more classic marshmallow flavor or only Fruity Pebbles if you want a brighter fruity cereal taste. Using both simply creates a colorful and fun flavor combination.

Why are my Rice Krispie treats hard instead of soft and gooey?

This usually happens if the marshmallows cook too long or the mixture gets pressed too firmly into the pan. Melt the butter and marshmallows over medium heat and stir constantly, then gently press the mixture into the pan so the treats stay soft and chewy.

Can I add extra toppings or mix ins?

Absolutely! Mini marshmallows, white chocolate chips, or even sprinkles make great additions. You can also press a few extra Lucky Charms marshmallows on top before the treats cool to give them an extra colorful and magical look.

Want More Fun Dessert Ideas?

Looking for other recipes like this? Try these:

See more Desserts →

Need Dinner Too?

Here are some of our favorite quick dinners that you can make tonight!

See more Quick Dinners →

📖 Recipe