Lucky Charms Cupcakes are a delightful and whimsical treat that will bring joy to any occasion. These fluffy vanilla cupcakes are studded with crunchy cereal and topped with a dreamy marshmallow buttercream frosting. Perfect for birthdays, St. Patrick’s Day, or anytime you want to indulge in a bit of nostalgia, these cupcakes are as fun to make as they are to eat!
What Are Lucky Charms Cupcakes?
Lucky Charms Cupcakes are made by incorporating Lucky Charms cereal (minus the marshmallows) into a simple vanilla cupcake base. They’re then topped with a luscious marshmallow buttercream frosting and garnished with colorful Lucky Charms marshmallows for a playful finishing touch. This recipe combines the classic flavor of marshmallows with the comforting sweetness of vanilla cake to create a unique and festive dessert.
Why You’ll Love This Recipe
- Easy to Make: Uses a store-bought cake mix for convenience.
- Kid-Friendly: Perfect for family baking and sure to delight little ones.
- Versatile: Great for parties, holidays, or just a fun dessert at home.
- Whimsical Appeal: The bright marshmallows add a playful and festive vibe.
Ingredients
For the Cupcakes:
- 1 box vanilla or white cake mix (plus ingredients listed on the box)
- 1 cup Lucky Charms cereal (reserve marshmallows for topping)
For the Marshmallow Buttercream Frosting:
- 1 cup (227 g) unsalted butter, softened
- 1 jar (7 oz) marshmallow creme (or fluff)
- 2 cups (240 g) powdered sugar
- 1 tsp vanilla extract
- Lucky Charms marshmallows, for decoration

Step-by-Step Instructions
Preparing the Cupcakes
- Preheat your oven to 350°F (175°C). Line a muffin tin with cupcake liners.
- Prepare the cake batter according to the instructions on the box.
- Gently fold in the Lucky Charms cereal (without the marshmallows) until evenly distributed.
- Divide the batter evenly among the cupcake liners, filling each about â…” full.
- Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean.
- Remove from the oven and let the cupcakes cool completely before frosting.
Making the Marshmallow Buttercream Frosting
- In a large mixing bowl, beat the softened butter using an electric mixer until creamy and smooth.
- Add the marshmallow creme, powdered sugar, and vanilla extract. Beat on medium speed until the frosting becomes light and fluffy.
- Transfer the frosting to a piping bag fitted with your favorite tip, or use a spatula to frost the cooled cupcakes.
Decorating the Cupcakes
- Sprinkle Lucky Charms marshmallows generously over the frosting for a fun and colorful topping.
- Serve immediately or store for later!

Serving Suggestions
- Occasions: These cupcakes are perfect for birthday parties, St. Patrick’s Day celebrations, or even school bake sales.
- Pairings: Serve with a glass of cold milk, hot cocoa, or a creamy latte for an extra indulgent treat.
Storing and Freezing
Storage Tips
- Store the frosted cupcakes in an airtight container at room temperature for up to 2 days.
- If storing longer, refrigerate for up to 5 days. Bring to room temperature before serving.
Freezing Instructions
- Unfrosted cupcakes can be frozen for up to 2 months. Wrap each cupcake in plastic wrap and store in a freezer-safe container.
- Thaw the cupcakes at room temperature before frosting and decorating.
Recipe Variations
- Gluten-Free: Use a gluten-free cake mix and ensure the cereal is also gluten-free.
- Dairy-Free: Substitute vegan butter for the frosting and use a dairy-free cake mix.
- Extra Marshmallow Flavor: Mix a handful of chopped Lucky Charms marshmallows into the frosting for added sweetness.
- Chocolate Base: Swap the vanilla cake mix for chocolate for a fun twist.
FAQs
Can I make the frosting ahead of time?
Yes! Prepare the frosting and store it in an airtight container in the refrigerator for up to 3 days. Bring it to room temperature and re-whip before using.
What’s the best way to pipe the frosting?
Use a large star tip for a pretty swirl, or go simple with an offset spatula for a rustic look.
Can I use homemade cake batter instead of a mix?
Absolutely! Just use your favorite vanilla or white cake recipe and proceed with the instructions as written.
Lucky Charms Cupcakes with Marshmallow Buttercream Frosting are a delightful treat that combines nostalgia with a playful presentation. Whether you’re baking for a holiday, a party, or simply to satisfy your sweet tooth, these cupcakes are sure to be a hit. Try them out and let us know how they turned out for you!
Print
Lucky Charms Cupcakes with Marshmallow Buttercream Frosting
- Total Time: 35 minutes
- Yield: 12 cupcakes
Description
Whimsical and fun, these Lucky Charms Cupcakes are made with a vanilla cake base studded with cereal, then topped with fluffy marshmallow buttercream frosting and colorful marshmallow decorations. Perfect for parties or a nostalgic treat!
Ingredients
For the Cupcakes:
- 1 box vanilla or white cake mix (plus ingredients listed on the box)
- 1 cup Lucky Charms cereal (reserve marshmallows for topping)
For the Marshmallow Buttercream Frosting:
- 1 cup (227 g) unsalted butter, softened
- 1 jar (7 oz) marshmallow creme (or fluff)
- 2 cups (240 g) powdered sugar
- 1 tsp vanilla extract
- Lucky Charms marshmallows, for decoration
Instructions
Preparing the Cupcakes
- Preheat your oven to 350°F (175°C). Line a muffin tin with cupcake liners.
- Prepare the cake batter according to the instructions on the box.
- Gently fold in the Lucky Charms cereal (without the marshmallows) until evenly distributed.
- Divide the batter evenly among the cupcake liners, filling each about â…” full.
- Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean.
- Remove from the oven and let the cupcakes cool completely.
Making the Marshmallow Buttercream Frosting
- In a large bowl, beat softened butter with an electric mixer until creamy and smooth.
- Add the marshmallow creme, powdered sugar, and vanilla extract. Beat until light and fluffy.
- Transfer the frosting to a piping bag or use a spatula to frost the cooled cupcakes.
Decorating the Cupcakes
- Top each frosted cupcake with a generous sprinkle of Lucky Charms marshmallows for a colorful, whimsical finish.
- Serve immediately or store as needed.
Notes
- For extra crunch, toast the Lucky Charms cereal (without marshmallows) in the oven for a few minutes before folding it into the batter.
- Ensure the cupcakes are completely cool before frosting to avoid melting the buttercream.
- Store frosted cupcakes in an airtight container at room temperature for up to 2 days, or refrigerate for longer storage.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cupcake
- Calories: Approximately 350 kcal