Lucky Charms Rice Krispie Treats (Soft & Gooey!)
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These Lucky Charms Rice Krispie Treats are soft, gooey, and made with melted marshmallows plus colorful Lucky Charms marshmallows in every bite. They come together in minutes and make the cutest no‑bake dessert for St. Patrick’s Day or any time you’re craving something fun and nostalgic. My son loves the store‑bought cereal bars, but these homemade ones are even better—extra marshmallows, extra magic, and so much more budget‑friendly.
Bring a little magic back to snack time with these fun, colorful Lucky Charms Rice Krispie Treats! If you love whimsical desserts, try my Magically Delicious Mountain Dew Cupcakes, Rainbow Rice Krispie Marshmallow Treats and these 15 St. Patrick’s Day Desserts!
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🍀 Why You’ll Love These Lucky Charms Rice Krispie Treats
- Packed with gooey marshmallows for that soft, chewy, bakery‑style texture everyone loves.
- Colorful St. Patrick’s Day Lucky Charms treats that make each square magical and fun.
- Quick, no‑bake recipe that comes together in minutes with simple ingredients.
- They’re the ultimate nostalgic treat—colorful, sweet, and just like the cereal bars we grew up with.
- Perfect for St. Patrick’s Day, birthday parties, school treats, or anytime you want something whimsical.
- Kid‑approved and budget‑friendly, with way more marshmallow goodness than the store‑bought cereal bars.
- Easy to customize with extra marshmallows, rainbow sprinkles, or white chocolate drizzle.
Why This Recipe Works
The marshmallows are melted low and slow so the bars stay soft and gooey instead of firm.
- Adding extra mini marshmallows at the end creates melty pockets in every bite.
- Lucky Charms marshmallows add color, crunch, and a fun twist on classic Rice Krispie treats.
- The cereal‑to‑marshmallow ratio keeps the bars chewy, not dry or overly sticky.
- A gentle press ensures the treats hold together without becoming dense or hard.
4 Ingredients Needed for Lucky Charms Rice Krispie Treats
You only need a handful of simple ingredients to make these soft, gooey, magically colorful bars. They’re quick, budget‑friendly, and perfect for St. Patrick’s Day or anytime you want a fun no‑bake treat.
🍀 Lucky Charms Rice Krispie Treats Ingredients
- Butter — adds richness and helps everything melt smoothly.
- Mini marshmallows — the key to that soft, gooey texture.
- Lucky Charms cereal — colorful marshmallows + crunchy cereal in every bite.
- Optional rainbow sprinkles — extra color and fun for parties or holidays.
- Optional pinch of salt — a pinch of salt sharpens the sweetness and makes the marshmallow and cereal flavors taste richer and more balanced.
🍀 How to Make the Best Lucky Charms Rice Krispie Treats
- Prep a 9×13 pan by buttering or spraying it with nonstick cooking spray or line with a piece of parchment paper for easy removal. Still do the light spray of nonstick cooking spray.
- Melt the butter in a large nonstick saucepan over low heat.
- Add the full package of mini marshmallows and stir until completely melted and smooth. Add the remaining 2 cups of marshmallows and let them melt partially for extra gooey pockets.
- Stir in the Lucky Charms cereal until everything is evenly coated.
- Transfer the cereal mixture to the prepared pan and gently press it down with a buttered or sprayed spatula. Don’t press too firmly or the bars will become hard.
- Add sprinkles immediately, if using, and lightly press them into the top.
- Let the treats cool for about 2 hours, then cut into squares.
🍀Recipe Notes
- Use fresh mini marshmallows for the softest, gooey texture. Older marshmallows don’t melt as smoothly.
- Keep the heat low when melting the butter and marshmallows to prevent the mixture from becoming stiff.
- Don’t press the mixture too firmly into the pan or the bars will turn hard instead of staying soft and chewy.
- Add sprinkles right away so they stick to the warm marshmallow mixture.
- Let the treats cool completely before slicing for the cleanest squares.
- Store in an airtight container at room temperature for 2–3 days to keep them soft.
Variations
- Extra Marshmallow Treats — Add an extra 1–2 cups of mini marshmallows for an even softer, gooier texture.
- Rainbow Sprinkle Treats — Mix rainbow sprinkles directly into the cereal before pressing into the pan for extra color and fun.
- Half & Half Cereal Mix — Use 3 cups Lucky Charms and 2 cups Rice Krispies for a lighter, crispier texture.
- White Chocolate Drizzle —A fun way to switch things up is to drizzle white chocolate on top for extra flavor. Just drizzle melted white chocolate over the top before cutting for a sweet, candy‑bar finish.
- Birthday Cake Version — Add ½ teaspoon vanilla extract and fold in rainbow jimmies for a cake‑batter vibe.
- St. Patrick’s Day Version — Use the all‑green Lucky Charms marshmallows (seasonal boxes) or add green sprinkles on top.
- Salted Butter Upgrade — Use salted butter for a sweet‑salty contrast that makes the marshmallow flavor pop.
- Extra Crunch Version — Add ½ cup crushed pretzels for a salty crunch that balances the sweetness.
- Chocolate Charm Treats — Use the chocolate Lucky Charms cereal for a cocoa‑marshmallow twist.
- Mini Bar Bites — Press the mixture into a quarter‑sheet pan for thicker, bakery‑style squares.
Other Cereal Options
You can switch up the texture by using a mix of cereals instead of only Lucky Charms. Try using 3 cups of Lucky Charms and 2 cups of rice cereal for a fun blend of crunch and marshmallow pockets. Other options could include Cocoa Puffs or Fruity Pebbles.
🍀People Also Ask
What makes Lucky Charms Rice Krispies different?
They’re made with classic Rice Krispies plus Lucky Charms marshmallows for extra color, sweetness, and crunch.
How do you keep Rice Krispies treats soft?
Use fresh marshmallows, melt on low heat, and don’t press the mixture too firmly into the pan.
Can you make Lucky Charms treats ahead of time?
Yes, they stay soft for 2–3 days in an airtight container.
Can you use only the marshmallows?
Yes, using just the Lucky Charms marshmallows makes the bars extra colorful and sweet.
🍀 St. Patrick’s Day Lucky Charms Treats — FAQ
What makes Lucky Charms Rice Krispie Treats different?
They’re made with classic Rice Krispies plus Lucky Charms marshmallows for extra color, sweetness, and fun crunch in every bite.
How do I keep Rice Krispie treats soft and chewy?
Melt the marshmallows on low heat, use fresh cereal, and avoid pressing the mixture too firmly into the pan so they stay soft and gooey.
Can I make these ahead of time?
Yes. Store them in an airtight container for 2–3 days. They stay soft and chewy when kept tightly covered at room temperature.
Can I use only the Lucky Charms marshmallows?
YYes. Using just the marshmallows makes the bars extra colorful and sweet, and kids love the extra pops of color.
Can I freeze Lucky Charms Rice Krispie Treats?
Yes. Freeze them for up to 2 months. Wrap each bar individually, then thaw at room temperature for the best texture.
Can I add extra marshmallows for gooey pockets?
Absolutely. Stir in an extra cup of mini marshmallows at the end for extra gooey, melty bites.
Serving Ideas
- Slice into small squares for lunchboxes, after‑school snacks, or party trays.
- Cut into larger bakery‑style bars for bake sales or gifting.
- Add green sprinkles or use seasonal Lucky Charms marshmallows for St. Patrick’s Day.
- Serve chilled for a firmer bite or at room temperature for maximum gooeyness.
- Pair with hot cocoa, milk, or a fun rainbow‑themed dessert spread.
Storage Instructions
- Store the St. Patrick’s Day Lucky Charms treats in an airtight container at room temperature for 2–3 days to keep them soft and chewy. If stacking them, place parchment paper between the layers to prevent sticking.
- These bars don’t need to be refrigerated, but you can chill them briefly if you prefer a firmer texture.
- For longer storage, wrap individual squares and freeze for up to 2 months, then thaw at room temperature before serving.
These Lucky Charms Rice Krispie Treats are the kind of soft‑and‑gooey, colorful dessert that disappears fast—kids love them, adults sneak seconds, and they always bring a little magic to the table. Whether you’re making them for St. Patrick’s Day or just craving something fun and nostalgic, these bars are guaranteed to be a hit. Enjoy every sweet, marshmallow‑packed bite!
These Lucky Charm cereal treats are also featured on 24 Festive Recipes to make this Saint Patrick’s Day on Tasty / Buzzfeed. Check them all out for your upcoming St. Patrick’s Day Party! These Lucky Charms Krispie Treats ARE Rock Star!
If you Love Sweet Treats, Take a Look at These!
- ‘Awesome’ Peanut Butter Buckeye Rice Krispies
- Best Marshmallow S’mores Rice Krispies
- 10 Magically Delicious Lucky Charm Desserts
- Milky Way ‘Like Wow’ Rice Krispies
- Easy Halloween Cereal Treats
- Caramel Peanut Butter Rice Krispies
- Butterfinger Rice Krispie Treats
- Luscious Lime Cake Vodka Jello Shots
- Ultimate Chocolate Peanut Butter Cup Stuffed Krispie Treats
- Lotsa St. Patrick’s Day Dessert Ideas for Your Celebration!
Lucky Charm Marshmallow Rice Krispie Treats
Ingredients
- 4 tablespoons butter
- 1 10.5 oz plus 2 cups mini marshmallows
- 5 cups Lucky Charms
- optional Rainbow Sprinkles
Instructions
- Line a 9x13 pan with parchment and lightly spray with non-stick cooking spray.
- Take large non-stick saucepan and melt butter on low heat.
- Add 1 package of marshmallows and stir keeping on low heat until they are melted into the butter. Then add in the last 2 cups and let them melt partially.
- Add in the Lucky Charms cereal and stir until the cereal is fully coated.
- Pour mixture into prepared pan and spread out around evenly with large spatula sprayed with non-stick spray or you can use butter.
- Press mixture down into pan evenly. (Don't over press, they become too compacted and hard). Optional: Add sprinkles immediately and press into treats.
- Let treats sit for 2 hours or so and cut into squares into preferred sizes.
- Seal treats after cutting.
Notes
Recipe Notes
• Use fresh mini marshmallows for the softest, gooey texture. Older marshmallows don’t melt as smoothly.• Keep the heat low when melting the butter and marshmallows to prevent the mixture from becoming stiff.
• Don’t press the mixture too firmly into the pan or the bars will turn hard instead of staying soft and chewy.
• Add sprinkles right away so they stick to the warm marshmallow mixture.
• Let the treats cool completely before slicing for the cleanest squares.
• Store in an airtight container at room temperature for 2–3 days to keep them soft.
Thank you, will do!
Drea, If you think they are too soft, just put them in the fridge for 10-15-ish mins, covered with saran wrap or tin foil to get them to firm up and then cut them. Sometimes if these kinds of treats stay out uncovered for too long they could become soggy depending on the moisture in the air they are cooling in from what I’ve read. Seal them after cutting. Thank you so much and I hope that helps!
I just made them and they look delicious! I’ve had them out for 2.5 hours and they seem a little too soft to cut. Did I do something wrong?
Just do the normal cereal recipe bars without extra marshallows:
4 cups of marshmallows
2 tablespoons butter
6 cups of Lucky Charms Cereal (could do a mixture of 3 cups rice krispies and 3 cups of lucky charms as well)
Pour cereal in a large bowl.
Melt butter and marshmallows over medium heat in a pan.
Once melted and smooth, pour the marshmallow mixture over the cereal in the large bowl.
Fold in melted marshmallows and mix until fully coated.
Spread into your prepared pan. Cut when cooled.
Hope that helps! 🙂
Thank you Elizabeth! So glad you enjoyed them. 🙂
How can i make these into actual cereal bars for the mornings were behind schedule? my girls love the breakfast bars with the breakfast cereals but foesnt seem worth the money to buy them store bc so expensive thanks in advance
These were yummy! Loved them and had fun with my girls making them! Thanks!
It’s one bag plus 2 cups mini marshmallows Julianne. 🙂
quick question before i head to the store for this recipe!! 🙂
just 1 bag of the regular sized marshmallows?
If you like, yes. I just added them as a decorative touch when I shot the pictures.
Trying this recipe this weekend.
There are no instructions for when to add the sprinkles…I am assuming after they are in the pan?
Oh wow! That sounds good with chocolate chips 🙂
I have made these for years. The recipe was on the Lucky Charm box. Has a cup of chocolate chips in it.
Hi Cindy,
3 Conversions for Marshmallows:
8 Regular Marshmallows = 1 cup
10.5 oz bag Miniature = 5-1/2 cups
Marshmallows 10 oz 280 g = 40 large Marshmallows.
I would go with 60 marshmallows or 7 1/2 cups total. Happy Holidays!
All i could find was 2 bags of 400 g each regular marshmallow, not miniature so how many cups in total do i need??