Lucky Charms Bars are a sweet, crunchy, and colorful twist on Rice Krispie Treats with all the nostalgia in every bite!

Lucky Charms Bars stacked and ready to enjoy.

Lucky Charms Bars

Growing up, my mom made Lucky Charms Bars every St. Patrickโ€™s Day, and now itโ€™s a tradition Iโ€™ve carried on with my kids. They love picking out extra marshmallows and canโ€™t get enough of these bars!

Theyโ€™re just as easy as Rice Krispie Treats, with a buttery marshmallow base, a splash of vanilla, and a pinch of sea salt for the perfect gooey, chewy texture. Topping them with Lucky Charms marshmallows adds extra sweetness and crunch.

Quick Tip

Have leftover Lucky Charms? Put them to use in this St. Patrickโ€™s Day Popcorn or Leprechaun Bait!

All the ingredients prepped for easy assembly: cereal, butter, salt, vanilla, and marshmallows.

Ingredients in the Lucky Charms Bars

  • Unsalted butter: Use unsalted butter to control how salty the bars are.
  • Marshmallows: Use the freshest, softest marshmallows for the best texture.
  • Vanilla extract: Good-quality vanilla makes a big difference in flavor.
  • Salt: A little goes a long way!
  • Lucky Charms cereal: Stir gently so the cereal doesnโ€™t break apart.
  • Lucky Charms marshmallows: I just grab some straight from the cereal!
Marshmallows melting down with vanilla and Lucky Charms added for these bars.

How To Make Lucky Charms Bars Tips

  • Keep heat low: If the heat is too high, the marshmallows will get hard. Melt them slowly, stir often, and remove from heat once smooth.
  • Grease the pan well: Coat the pan well so the bars donโ€™t stick.
  • Use a strong spatula: A sturdy, heat-safe spatula makes mixing and spreading easier.
  • Press mixture evenly: Use a spatula or spoon to spread and flatten the mixture.
  • Let cool before cutting: This helps the bars set and keeps them from falling apart.
The mixture stirred together with extra marshmallows added.

Preventing Sticky Hands

Spray your hands or a spatula with cooking spray before pressing the bars into the panโ€”no sticking, just smooth, easy shaping!

How Long For Lucky Charms Bars To Harden?

Let the bars cool for 30 minutes before cutting. This helps them firm up, so theyโ€™re easier to slice and wonโ€™t break apart. Waiting is worth it!

Variations

Looking for a chocolate twist on the classic Lucky Charms bars? Try using Chocolate Lucky Charms instead!

Lucky Charms Bars in a pan, ready to cut, serve, and enjoy.

Storage

How To Store Lucky Charms Treats

These are best the day you make them since the marshmallows firm up over time.

Keep them in an airtight container at room temp. Skip the fridge or freezerโ€”moisture makes them soggy.

More Tasty No-Bake Treats:

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Lucky Charms Bars

Lucky Charms Bars are a colorful take on classic Rice Krispie Treats. They're sweet, crunchy, and packed with gooey marshmallows.
Prep Time: 20 minutes
Set Up Time: 30 minutes
Total Time: 50 minutes
Servings: bars

Equipment

Ingredients

  • 1/3 cup unsalted butter
  • 1 (10-ounce) package soft marshmallows divided, see note 1
  • 1 teaspoon vanilla extract
  • 1/8 teaspoon salt
  • 6 cups Lucky Charms cereal
  • 1/2 cup Lucky Charms Marshmallows optional

Instructions 

  • Generously grease a 9ร—13-inch pan with cooking spray. Set aside.
  • In a large nonstick pot, melt the butter over medium-low heat. Once melted, reduce the heat to low and add 6 cups of marshmallows. Stir continuously with a heat-resistant spatula until fully melted. (Avoid turning up the heatโ€”this can make the bars too hard.)
  • Once melted, remove the pot from the heat and stir in the vanilla extract and salt. Add in Lucky Charms cereal and stir gently to incorporate. Add in the remaining marshmallows and stir until ingredients are well and evenly coated in marshmallow mixture. (Itโ€™s not intended for these additional marshmallows to completely melt.)
  • Spoon the mixture into the prepared pan and gently press it into an even layer. (Spray your hands with cooking spray to prevent sticking.) Sprinkle the optional Lucky Charms marshmallows on top and gently press them in.
  • Let the bars cool completely, about 30 minutes. Once set, cut into squares with a sharp knife.

Video

Recipe Notes

Note 1: Marshmallows can get stale over time, which affects their ability to melt properly. Use the freshest, softest marshmallows you can find.
Note 2: Heating the marshmallows too quickly makes the bars hard. Keep the heat low and stir constantly.
Storage: These are best enjoyed on the same day. After that, the marshmallows in the bars can become hard and stale, which affects the texture and flavor of the bars. 

Nutrition

Serving: 1serving | Calories: 142kcal | Carbohydrates: 25g | Protein: 1g | Fat: 5g | Saturated Fat: 3g | Polyunsaturated Fat: 0.4g | Monounsaturated Fat: 1g | Trans Fat: 0.2g | Cholesterol: 10mg | Sodium: 120mg | Potassium: 32mg | Fiber: 1g | Sugar: 15g | Vitamin A: 499IU | Vitamin C: 4mg | Calcium: 60mg | Iron: 3mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Meet Chelsea


Hello, and welcome to Chelseaโ€™s Messy Apron! Iโ€™m Chelsea, the recipe developer, food photographer, and writer behind the site. Iโ€™m passionate about creating simple, reliable, and delicious recipes that anyone can make.

Thanks for stopping byโ€”I hope you find something delicious to make!

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