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Lucky Charms Treats

Lucky Charms Treats are a fun spin on traditional marshmallow treats. They only require 4 ingredients and are ready to enjoy in about 45 minutes.

We don’t have a ton of recipes for St. Patrick’s Day, but we’re slowing add more as the years go by. These Lucky Charms Treats is more of a fun novelty recipe, but I thought I’d throw them into the mix. We like to switch between these and our Fruity Pebbles Treats when we want a sweet cereal treat.

They’re a smaller batch version of our Rice Krispie Treats recipe, and great for sharing. These marshmallow treats are the perfect balance of gooey marshmallows and sweet Lucky Charms cereal.

They go from start to finish in about 45 minutes, so they take no time at all to prepare. If you’re looking for some other St. Patrick’s day recipes, try our shamrock shake, colcannon, or shepherd’s pie bake.

Stack of Lucky Charms Treats on a plate.

How to make Lucky Charms Treats:

  • Grab a 9 x 13-inch pan or baking dish and butter it well. Another option is to line with aluminum foil and butter the foil or spray the pan with cooking spray.
  • Set the baking dish aside. Next, heat a large stock pot or Dutch oven over low heat.
  • Add the mini marshmallows and butter. Stir continuously until the marshmallows are almost completely melted and the butter is well combined.
  • Pour in the vanilla, and continue to stir. Turn off the heat.
Collage style photo showing how to melt marshmallows and butter in a pan.
  • Pour in the Lucky Charms cereal, and quickly stir to coat with the melted marshmallows. Make sure to stir down to the bottom of the pan, because there are usually pockets of melted marshmallow hiding below the cereal.
  • Ensure that all the cereal is evenly coated, then scoop it out into the prepared baking dish. Butter your hands or a spatula, and press the cereal into an even layer.
  • Allow the cereal to set for at least 30 minutes before cutting into squares and serving.
Collage style photo show how to make marshmallow treats.
Can this recipe be doubled?

Yes, this recipe can be doubled. It should still fit in a 9 x 13-inch pan, but it will come to the very top or just barely over the top. The Lucky Charms Treats will be double the thickness, and the nutrition information will be double as well.

Can you use marshmallow crème in place of mini marshmallows?

Yes, you can use marshmallow fluff or marshmallow crème in place of the mini marshmallows. According to this handy marshmallow conversion chart, you’ll need about 3 cups of marshmallow fluff or 14 ounces. You can also use about 40 regular marshmallows.

Will this recipe fit into a smaller pan?

This recipe will fit into two 8 x 8-inch pans. The treats will be a little thicker.

What’s the best way to store Lucky Charms Treats?

The best way to store these marshmallow treats is to cut them into squares and wrap them individually in plastic wrap. Then, place them in an airtight container. They’ll stay fresh for about 3 to 4 days.

We don’t recommend placing them in the refrigerator, because the cool, dry air tends to dry them out.

What are some add-in ideas for these marshmallow treats?

If you can locate the Lucky Charms Just Magical Marshmallows, those would be a great add-in or topping option.

Another option is to melt some white chocolate and drizzle over the top. You can also dip the bottoms of the treats into melted white chocolate, or add some colorful sprinkles.

Stack of three marshmallow treats.
Yield: 32 Treats

Lucky Charms Treats

Marshmallow treats stacked on a white plate.

Lucky Charms Treats are a fun spin on traditional marshmallow treats. They only require 4 ingredients and are ready to enjoy in about 45 minutes.

Prep Time 5 minutes
Cook Time 10 minutes
Set Time 30 minutes
Total Time 45 minutes


  • 1 (10 Ounce) Package Mini Marshmallows (about 6 cups)
  • 4 Tablespoons Unsalted Butter
  • 2 Teaspoons Vanilla
  • 6 Cups Lucky Charms Cereal


  1. Butter a 9 x 13-inch dish. Set aside.
  2. In a large pan, melt butter and marshmallows over low heat. Add the vanilla, and stir to combine.
  3. Remove from heat, and stir in the cereal. Mix well, and ensure all cereal is evenly coated. 
  4. Transfer the cereal mixture to the prepared baking dish. Use buttered hands to press the cereal into an even layer. Allow the cereal to set for at least 30 minutes before serving. 
  5. Store wrap in plastic or in an airtight container for up to 3 days. We do not recommend refrigerating.


*The calories listed are an approximation based on the ingredients in the recipe card and a serving size of 1 square. Actual calories will vary.

*For more information, tips, and answers to frequently asked questions, please refer to the post.

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Nutrition Information:



Serving Size:

1 Square

Amount Per Serving: Calories: 67Total Fat: 2gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 1gCholesterol: 4mgSodium: 51mgCarbohydrates: 13gFiber: 0gSugar: 8gProtein: 1g

*The calories are an estimate and are based on the ingredients and serving size listed. The calories can vary depending on the brand of product purchased.

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