These Lucky Charms Treats With Extra Marshmallows Are Like a Rainbow of Joy

updated Mar 10, 2023
Lucky Charms Marshmallow Bites

Lucky Charms lovers, rejoice in this cereal-meets-snack bar mash-up perfect for St. Paddy's Day.

Makes16 (2-inch) squares

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Credit: Lauren Volo

Do you love Rice Krispies treat bars and Lucky Charms cereal? Then this recipe is for you. It’s a perfectly festive way to celebrate St. Patrick’s day without breaking out any green food coloring. Plus, it only requires three ingredients (plus two optional, but highly recommended, ones). These bars have a double dose of marshmallows, thanks to the Lucky Charms, and are an amazingly tasty upgrade to the classic marshmallow and cereal bar.

Tips for the Tastiest (and Prettiest!) Treats

You can make these Lucky Charms treats by swapping the cereal called for in your favorite Rice Krispie treat recipe, but take my advice here and spend a few minutes pulling out a cup of the Lucky Charms marshmallows for topping the bars.

Or, if you don’t have that kind of time, just order cereal marshmallows in bulk from Amazon! (Isn’t the internet wonderful?)

Most cereal bars are just butter, marshmallows, and cereal, but you can take these treats to the next level by adding a dose of vanilla and salt to the mix too.

As a parent of two small children, I’m always looking for simple, joy-filled ways to celebrate minor holidays without much effort. This year I set out to find quick and easy recipes that can be made with common grocery store ingredients for festive treats perfect for a classroom party or just a get-together with friends. So I can recommend this recipe for Lucky Charms Ice Cream Sandwiches as well!

Lucky Charms Marshmallow Bites

Lucky Charms lovers, rejoice in this cereal-meets-snack bar mash-up perfect for St. Paddy's Day.

Makes 16 (2-inch) squares

Nutritional Info


  • Cooking spray

  • 6 cups

    marshmallow cereal, such as Lucky Charms

  • 6 tablespoons

    (3/4 stick) unsalted butter, cut into 6 pieces

  • 1 (10-ounce) package

    mini marshmallows (about 4 cups), divided

  • 1/2 teaspoon

    vanilla extract (optional)

  • 1/4 teaspoon

    kosher salt (optional)


  1. Coat an 8x8-inch baking pan with cooking spray.

  2. Pick out about 1 cup of marshmallow pieces from the cereal and set aside for topping the bars.

  3. Melt the butter in a large saucepan over low heat. Working quickly, add half of the marshmallows and stir until thoroughly melted. Add the remaining marshmallows and stir until melted. Stir in the vanilla and salt if using. Add the cereal and gently fold it in until completely coated with the melted marshmallow mixture.

  4. Transfer to the baking pan. Using a rubber spatula, lightly and gently press into an even layer. Sprinkle with the reserved marshmallow cereal. Let the treats stand at room temperature until set, about 1 hour. Cut into 2-inch squares and serve.

Recipe Notes

Storage: Leftovers can be stored in an airtight container at room temperature for up to 5 days. Layer parchment or waxed paper between the layers to prevent sticking.