Looking for an easy, festive treat for St. Patrick’s Day? These Quick & Easy Lucky Charms Marshmallow Bars are a quick, no-bake recipe that’s packed with gooey marshmallows and the nostalgic crunch of Lucky Charms cereal. With colorful marshmallows and a hint of vanilla, these bars are “magically delicious” and perfect for any celebration!
Why You’ll Love These Lucky Charms Marshmallow Bars
These no-bake Quick & Easy Lucky Charms Marshmallow Bars are the perfect St. Patrick’s Day treat—and they only require a few simple ingredients. They come together in minutes, require no oven time, and offer the perfect balance of crunchy, gooey, and sweet. Whether you’re making them for a festive party, a fun family activity, or just because you love Lucky Charms, these bars are guaranteed to bring a little magic to your day.
Ingredient Line-Up
Butter – not only does butter add richness and flavor, it also keeps the treats from becoming too sticky or hard.
Marshmallows – mini marshmallows hold everything together, making the treats soft and gooey.
Lucky Charms Cereal – not only are the treats colorful, the cereal adds a delightful crunch. You can use either the brand name cereal or generic – either works well.
White Chocolate Chips – add additional flavor and texture.
Vanilla – adds a cozy, vanilla sweetness to the treats.
Food Coloring – optional, but a small touch of green adds a festive St. Patrick’s Day touch to your treats.
Baking Tools Needed
Pan – use an 8×8” baking pan to place the Lucky Charms mixture into while they cool. For easier removal, line your pan with parchment paper.
Measuring Cups and Spoons – easily measure your ingredients with measuring cups and measuring spoons. Or, use a kitchen scale and weigh ingredients.
Mixing Bowls – use mixing bowls to gather the dry ingredients and use a large microwave-safe bowl to melt/stir the cereal mixture.
Spatula and/or Spoon – use a silicone spatula or wooden spoon to mix and stir everything.
Cutting Board – use a cutting board to cut the bars.
Knife – use a knife to cut the bars or for little bakers, use kid-safe nylon knives.
Tips for Making the Best Lucky Charms Marshmallow Bars
Making these Quick & Easy Lucky Charms Marshmallow Bars is simple, but a few helpful tips will make the process go smoother and the end results will be even tastier.
- Use fresh marshmallows. Stale marshmallows don’t melt as smoothly and can lead to tough, less gooey bars. Always use a fresh bag.
- Don’t overheat the marshmallow mixture. Overheating the marshmallows can make the treats too hard. Microwave in 15-30 second intervals, stirring in between each interval, until they are smooth and fully melted.
- Reserve some marshmallows for the top. Before mixing, set aside a handful of Lucky Charms marshmallows. Press them onto the bars while they’re still warm for extra color and crunch.
- Mix the mixture thoroughly. Be sure to mix the cereal mixture thoroughly to ensure every piece of cereal or chip is covered in the marshmallowing goodness.
- Grease your baking tools. Use cooking spray on your spatula and/or wooden spoon to keep the marshmallow mixture from sticking.
- Wet your hands. If you press the mixture into the pan with your hands, be sure to wet them with water first to prevent the cereal mixture from sticking.
- Use a light touch when pressing the mixture. If you press the mixture too firmly, the bars can become dense instead of soft and chewy.
- Cool treats at room temperature. Allow the bars to cool at room temperature for at least an hour before cutting to get clean, even slices.
Making Lucky Charms Marshmallow Bars
With just a few steps, you’ll be able to make these easy and festive no-bake treats for St. Patrick’s Day–or any day you’d like a treat.
1. Melt butter in the microwave.
2. Add marshmallows; microwave until melted.
3. Add food coloring and stir.
4. Add cereal to melted marshmallows.
5. Add all other ingredients.
6. Stir to completely coat the cereal mixture.
7. Gently press the mixture into the pan.
8. Once cooled, cut into bars.
Fun and Festive Add-Ins
Want to make your bars even more festive or indulgent? Try these creative add-ins and make these bars uniquely your own.
- Food Coloring – add a pop of St. Patrick’s Day color with green food coloring.
- Holiday Sprinkles – add St. Patrick’s Day-themed holiday sprinkles and take these bars to the next level.
- Chocolate Chips – add milk chocolate, dark chocolate, or butterscotch chips for an extra sweet touch.
- Melted Chocolate – drizzle or dip melted bars with white chocolate melting wafers. Add sprinkles or sugars to the chocolate before it hardens for even more color.
- Cookie Pieces – fold in chunks of crushed Oreos, Nilla Wafers, or Golden Grahams for a fun texture contrast.
- Crushed Candies – stir in crushed candies, like Skittles or chopped Andes mints, for an extra burst of color and flavor.
Storing Your Festive Lucky Charms Marshmallow Bars
Quick & Easy Lucky Charms Marshmallow Bars are the freshest when they are first made. However, if stored properly, bars can remain fresh for you to enjoy later.
- Room Temperature. If eating within a day or two, store your treats on the counter. Layer treats between wax or parchment paper to prevent sticking, wrap in plastic wrap and place into an airtight container.
- In the Freezer. If freezing, layer treats between wax or parchment paper to prevent sticking and wrap in plastic wrap. Place into an airtight container or freezer bag and freeze for up to 3 months. When you’re ready to eat, let them defrost at room temperature for about 30 minutes.
Other Recipes With Cereal
Want to make other cereal-based treats? Then be sure to try these Lucky Charm Cookies. Or, make some Simple, No Bake Rice Krispie Treats or give these S’mores Rice Krispie Treats a try. Did you make these? Be sure to leave a rating and let us know how they turned out.
Quick & Easy Lucky Charms Marshmallow Bars
Ingredients
- 4 tbsp (57g) butter
- 6 cups (275g) mini marshmallows reserve 1 cup (47g)
- 6 cups (216g) Lucky Charms cereal reserve some marshmallows
- 1 cup (190g) white chocolate chips
- 2 tsp (10g) vanilla extract
- 1-2 drops green food coloring optional
Instructions
- Line your 8x8 baking pan with parchment (or grease the pan lightly). Set aside.
- In a large microwave-safe bowl, melt the butter, about 10-15 seconds.
- Add marshmallows to the bowl and coat with the butter. Place the bowl in the microwave and melt in 15-30 second intervals. Stir in between each interval until smooth and completely melted.
- If you choose to color the treats with green food coloring, add a drop and stir.
- Add in the cereal, white chocolate chips, vanilla and the 1 cup extra marshmallows and stir until completely coated.
- Spread the cereal mixture into the pan.
- Coat your spatula with cooking spray or lightly wet your hands and gently press the mixture down into the pan without pushing it down too hard.
- Add the extra Lucky Charms marshmallows on top and press into the mixture. Be sure to make the top look as even as possible.
- Cover with plastic wrap and let the mixture cool completely before cutting into bars, about 1-2 hours.
- Once cooled, remove from the pan and place on a cutting board. Cut into 12 bars.
- Recipe yields more or less, depending on how large or small bars are cut.
- Cover and store at room temperature for up to 3 days or freeze for up to 3 months.
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