Looking for the easiest festive dessert for St. Patrick’s Day? These Lucky Charms Treats are colorful, gooey, and irresistibly chewy cereal bars made with melted marshmallows, butter, and crunchy Lucky Charms cereal.
Just like classic marshmallow cereal bars, this recipe comes together in 15 minutes with only 3 ingredients, making it perfect for kids’ parties, holiday desserts, or quick sweet snacks. The bright rainbow marshmallows add a magical St. Patrick’s Day twist that’s guaranteed to bring smiles.
Whether you’re planning a school celebration, festive dessert table, or a fun baking activity with kids, these Lucky Charms bars are a lucky treat everyone will love.
table of contents
Recipe Overview
Prep Time: 10 minutes
Cook Time: 5 minutes
Cool Time: 1 hour
Total Time: 1 hour 15 minutes
Servings: 16 bars
Cuisine: American
Course: Dessert
Calories: ~161 kcal
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Ingredients
- 7 cups Lucky Charms cereal (275g)
- 5 tablespoons unsalted butter
- 7 cups mini marshmallows
Optional:
- Flaky sea salt
- Extra Lucky Charms marshmallows for topping
Instructions
1️⃣ Prepare the Pan
Line a 9×9 inch baking pan with parchment paper or foil.
Lightly grease the lining with cooking spray.
2️⃣ Separate Marshmallow Pieces
Measure the cereal and remove about ⅓ cup of the colorful marshmallow pieces.
Set aside for topping.
3️⃣ Melt Butter & Marshmallows
In a large pot over medium heat:
- Melt the butter
- Add the mini marshmallows
- Stir constantly until fully melted (about 5–7 minutes)
Remove from heat.
4️⃣ Add Cereal
Quickly fold in the Lucky Charms cereal.
Mix until evenly coated.
5️⃣ Press Into Pan
Transfer mixture to the prepared pan.
Using a spatula or butter wrapper:
- Press mixture gently into an even layer.
Sprinkle the reserved marshmallows on top.
6️⃣ Cool
Let cool 1 hour at room temperature.
Lift out using parchment and cut into 16 squares.
Pro Tips for Perfect Cereal Bars
✔ Don’t press mixture too tightly — bars stay soft
✔ Spray spatula with cooking spray to prevent sticking
✔ Add a pinch of salt to balance sweetness
✔ Work quickly before marshmallows harden
Storage
Room Temperature
Store in airtight container up to 3 days.
Refrigerator
Keeps fresh up to 1 week.
Freezer
Freeze wrapped bars up to 2 months.
Fun Variations
Chocolate Drizzle
Add melted white or dark chocolate on top.
Rainbow Sprinkle Bars
Add festive sprinkles for extra color.
Lucky Charms Chocolate Treats
Mix in chocolate chips before pressing mixture into pan.
Disclaimer
Nutritional values are estimates and may vary depending on ingredients used.
Lucky Charms Treats
Ingredients
Equipment
Method
- Line a 9×9-inch baking pan with parchment paper or lightly grease it.
- In a large pot over medium heat, melt the butter. Add the mini marshmallows and stir until completely melted and smooth.
- Remove from heat and quickly fold in the Lucky Charms cereal until evenly coated.
- Press the mixture evenly into the prepared pan.
- Top with reserved marshmallow pieces if desired and allow to cool for about 1 hour.
- Cut into squares and serve.
Nutrition
Notes
Tried this recipe?
Let us know how it was!Conclusion
These Lucky Charms Treats are a simple, festive dessert that’s perfect for celebrating St. Patrick’s Day. With their gooey marshmallow texture and colorful cereal pieces, they’re a nostalgic treat that both kids and adults love.
Best of all, they require only three ingredients and 15 minutes of prep, making them one of the easiest holiday desserts you can make.