Colorful and fun Lucky Charms cookies made with sugar cookie dough, sweet cereal, and marshmallows. They’re a delightful treat for St. Patrick’s Day.

Cookies with Lucky Charms Cereal and Marshmallows in Stack

Aren’t these Lucky Charms cookies the most fun cookies you’ve ever seen? They are so perfect for St. Patrick’s Day celebrations. Plus, they give us the nostalgic feeling of watching Saturday morning cartoons with a big bowl of cereal.

This recipe uses tasty sugar cookie dough as its base, with the addition of ground sweet oat Lucky Charms cereal, delicious rainbow sprinkles, and Lucky Charms marshmallows. So delicious—and so much fun!

Ingredient Notes

Here are the simple ingredients you’ll need for this colorful cookie recipe.

Ingredients for Cookies with Lucky Charms

Oat cereal: we’ve incorporated the cereal portion of Lucky Charms (not just the marshmallows!). In the step-by-step, you’ll ground it up and add it to the dry ingredients.

Sprinkles: these are optional, but add even more rainbow colors to these cookies, which we love.


Hand Holding Cookie with Lucky Charms

How to Make Cookies with Lucky Charms

Follow these easy steps for making cookies with Lucky Charms cereal.


Preheat oven.

Preheat oven to 350 degrees Fahrenheit.


Grind oat cereal. Mix Dry Ingredients.

Take the Lucky Charms cereal and grind it into a flour-like consistency. We like to use a food processor, but you can also use a plastic bag and crush with a cup. Then mix the dry ingredients in a separate bowl.

Cereal in Bowl (Left) Ground Cereal in Bowl (Right)


Cream butter and sugar.

Add the softened butter to a mixing bowl. Top with sugar and mix until well blended.

Creaming Butter and Sugar in Glass Bowl


Add egg and vanilla.

Mix in the remaining wet ingredients.

Adding Vanilla and Egg to Cookie Mixture and Mixing with Hand Mixer


Add dry ingredients.

Mix in the dry ingredients until it forms a dough.

Adding Dry Ingredients to Wet Ingredients in Glass Bowl


Fold in marshmallows and sprinkles.

Carefully fold in the marshmallows and sprinkles.

Sprinkles and Lucky Charms Marshmallows on Top of Cookie Dough
Finished Cookie Dough in White Bowl


Spoon onto baking sheet. Bake for 8 to 10 minutes.

Using a small cookie scoop, add tablespoon-sized balls of dough to a cookie sheet. Make sure to leave room in between for the cookies to spread. Bake for 8 to 10 minutes at 350 degrees Fahrenheit.

Cookie Dough Balls on Baking Sheet


Remove from oven and add marshmallows.

Once the cookies are done, remove the baking sheet from the oven and add marshmallows on top of each cookie. Be sure to press them down into the cookie so they stay put.

Adding Marshmallows to Baked Cookies on Cookie Sheet


Enjoy! or store for later.

Allow the cookies to cool, and enjoy them immediately. Store them in an airtight container at room temperature, in the fridge, or in the freezer.

Stacks of Colorful Cookies with Lucky Charms Marshmallows

More About This Recipe

These cookies are not only fun to eat, but they are so fun to make. Kids will be excited to help! The dough comes together easily and topping the baked cookies with more mini marshmallows is a must. Then you get to see the full marshmallow shapes of rainbows, unicorns, clovers, moons, horseshoes, stars, pots of gold, and balloons.

Cookies with Lucky Charms Cereal and Marshmallows on Cookie Sheet

Frequently Asked Questions

Here are answers to commonly asked questions about making these colorful cookies.

Can I omit the sprinkles from the recipe?

Absolutely! The sprinkles are optional and can be left out without affecting the overall outcome of the cookies. They simply add extra color and fun.

Can I make these cookies ahead of time and freeze them?

Yes, you can freeze these cookies. Once baked and cooled, store them in an airtight container or freezer bag. They can be frozen for up to a few months. Thaw them at room temperature before serving.

Can margarine Be Used instead of butter for this recipe?

While margarine can be used as a substitute for butter, it may affect the flavor and texture of the cookies slightly. Butter generally provides better flavor in baked goods, but margarine can still be used if necessary.

More Cookie Recipes

More St. Patrick’s Day Recipes

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Cookies with Lucky Charms Cereal and Marshmallows in Stack

Lucky Charms Cookies

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Colorful and fun cookies made with sugar cookie dough and Lucky Charms marshmallows. They’re a delightful treat for St. Patrick’s Day.

  • Total Time: 2 hours
  • Yield: 3.5 dozen 1x


  • 1 cup butter, softened
  • 1 ½ cups granulated sugar
  • 2 large eggs
  • 2 tsp vanilla extract
  • 2 ¼ cups all-purpose flour
  • 1 tsp baking soda
  • ½ tsp baking powder
  • ½ tsp salt
  • 1 ½ cups Lucky Charms oat cereal (cereal only, no marshmallows), ground into a fine powder
  • 3 cups Lucky Charms marshmallows, divided
  • ¼ cup sprinkles (optional)


  1. Preheat the oven to 350°F.
  2. Using a food processor, grind 1 ½ cups of oat cereal into a flour-like consistency.
  3. In a medium bowl, mix together the cereal powder, flour, baking soda, baking powder, and salt. Set aside.
  4. In a large mixing bowl, cream together the butter and sugar.
  5. Add eggs and vanilla and mix well.
  6. Gradually add the flour mixture until well combined.
  7. Gently fold in 1 cup of the Lucky Charms marshmallows and sprinkles.
  8. Using a cookie scoop or spoon, drop dough onto an un-greased baking sheet (or use parchment paper for easy clean-up).
  9. Bake for 8-10 minutes (depending on your oven) or until the edges start to turn slightly golden brown.
  10. After removing the cookies from the oven (while they are still warm), add additional marshmallows to each cookie for decoration. Be sure to press them down into the cookie so they stay put.


  • Cookie scoop: we use a small cookie scoop, 1 tablespooon.
  • Storage: store in an airtight container at room temperature or in the fridge or freezer for extended periods.
  • Author: Kelsey Restemayer
  • Prep Time: 30 minutes
  • Cook Time: 10 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American


  • Serving Size: 1 cookie
  • Calories: 118
  • Sugar: 10.8 g
  • Sodium: 76.8 mg
  • Fat: 5.3 g
  • Saturated Fat: 3 g
  • Carbohydrates: 18 g
  • Protein: 1.3 g
  • Cholesterol: 21.5 mg
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