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lucky charms treats sitting on a white marble table.

Extra Thick Lucky Charms Marshmallow Treats

Published by Kate
Watch your family's eyes light up as they sink their teeth into these extra-thick marshmallow treats made with Lucky Charms!
5 from 2 votes
Prep Time 15 mins
Cook Time 0 mins
Total Time 15 mins
Course Desserts
Cuisine American
Servings 9 3-inch squares
Calories 332 kcal


  • 4 tablespoons butter
  • Pinch of salt
  • (10 oz) bags marshmallows (about 60 large marshmallows or 6 cups of miniature marshmallows)
  • 9 cups Lucky Charms cereal (exactly one 10.5 oz box)


  • Line an 8x8 inch baking dish with parchment paper, or spray with nonstick cooking spray.
  • Pick out ¼ cup of the marshmallows from the Lucky Charms; set aside.
  • Melt the butter and salt in a large saucepan or pot over medium heat. Add the marshmallows and stir until the marshmallows have completely melted.
  • Remove from the heat and let sit for 1 minute. Since Lucky Charms have marshmallows, this will prevent the marshmallows in the cereal from melting. Meanwhile, spray a small plastic resealable bag with cooking spray on one side.
  • Pour in the Lucky Charms and stir to combine. Pour the mixture into the prepared baking dish. Place your hand inside the plastic bag and push the cereal down into the dish in an even layer. The cooking spray prevents the mixture from sticking to the bag.  
  • Place the reserved Lucky Charms marshmallows on top and let cool for at least 30 minutes.
  • Lift the parchment paper out of the pan, place on a cutting board, and use a sharp knife to slice the Lucky Charms Treats into squares.
  • If not serving immediately, wrap the squares tightly in plastic wrap. Serve within 2 days.


  1. I used the St. Patrick’s Day edition of Lucky Charms, which has all green/yellow/white marshmallows.
  2. Use the extra half bag of marshmallows for hot cocoa, put into trail mix, or make a double batch of these gooey treats (a double batch will require 3 bags total). 
  3. To make these in the microwave, place the butter, salt, and marshmallows in a large microwave-safe bowl. Microwave on high for 1 minute, stir, and then continue heating in 30 second intervals until the marshmallows are melted. Stir in the cereal and proceed with the recipe as directed.


Calories: 332kcalCarbohydrates: 68gProtein: 4gFat: 7gSaturated Fat: 4gCholesterol: 13mgSodium: 272mgPotassium: 80mgFiber: 2gSugar: 40gVitamin A: 1172IUVitamin C: 10mgCalcium: 159mgIron: 8mg
Keyword Lucky Charms Treats, Marshmallow Treats
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