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Savoring The Good > Recipes > Dessert Recipes

St. Patrick’s Day Cupcakes with Irish Cream Buttercream

A woman with long brown hair wearing a light-colored blouse smiles at the camera in a softly lit indoor setting, offering a welcoming glimpse into the post author's personality.Sarah Mock headshot 100by100.
Updated: Mar 5, 2025 to include new step-by-step photos, clarified instructions, and/or improved tips for best results.· by Sarah Mock· Leave a Comment This post contains affiliate links.

St. Patrick's Day Leprechaun Irish Cream Buttercream Cupcakes feature a rich and creamy Irish cream buttercream topped with adorable marshmallow leprechaun hats, these cupcakes are easy to make and delicious to eat.

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St. Patrick's Day cupcakes topped with green leprechaun hats and orange frosting, displayed on a shamrock-shaped plate. A bottle lingers in the background.

Ingredients needed:

Assorted baking ingredients including cupcake with green fondant, powdered sugar, melting chocolates, marshmallows, milk, butter, sandwich cookies, Irish cream, and vanilla extract.

Cupcake Base:

  • 6-8 cupcakes (store-bought or homemade)

Buttercream:

  • ½ cup room-temperature salted butter
  • 2 ¼ cups powdered sugar
  • 1 teaspoon vanilla extract
  • 1 ½ tablespoons Irish cream
  • 1 tablespoon heavy cream
  • deep orange food gel color

Decorations:

  • 6-8 marshmallows
  • 8 ounces green melting chocolate
  • 2 ounces black melting chocolate
  • St. Patrick's Day sprinkles
  • 3-4 sandwich cookies

Recipe Card?

To find the full printable recipe with specific measurements and directions CLICK HERE to go to the recipe card.

Substitutions

  • Irish Cream Substitute: Use Irish cream coffee creamer or syrup for a non-alcoholic version.
  • Cupcake Base: Use vanilla, chocolate, or any preferred flavor.
  • Food Coloring: Adjust the shade of orange to your preference.

Non-Alcoholic Option

Substitute Irish cream with Irish cream coffee creamer or syrup.

Helpful Kitchen Tools

Baker piping cream on bread; various decorated pastries and cakes shown, featuring floral and swirl designs.

Disposable Piping Bags

400, 12inch Anti-Burst Pastry Bags, Tipless Icing Piping Bag for Cake, Cream Frosting and Cookie Decoration Supplies

Purchase on AMAZON
A mix of green, gold, and silver sprinkles, including shamrock shapes, round beads, and rods, scattered on a white surface.

St. Patricks Day Edible Sprinkle Mix

Sprinklefetti mixes contain jimmies, sugar pearls, nonpareils, sugar, dextrose or quin shapes, confetti quins and more!

Purchase on AMAZON

How to make Patrick's day cupcakes

Saint Patrick's Day cupcakes with green hats and orange frosting are beautifully decorated with shamrocks and gold buttons, all elegantly arranged on a vibrant green surface.

Perfect for parties, family gatherings, or a celebratory baking session, this recipe comes together in under an hour.

Prepare the Leprechaun Hats

Melt the green chocolate in a microwave-safe bowl in 30-second intervals, stirring between each interval until smooth.

A marshmallow on a skewer is being dipped into green candy coating, shown in a small cup and placed on a parchment-lined tray.
  1. Dip marshmallows in the green chocolate using a toothpick. 
  2. Scrape off excess chocolate and place on parchment paper to dry.
Three chocolate sandwich cookies on the left; one cookie in a glass of green liquid on the right, set against a white background.
  1. Separate sandwich cookies and dip the creamless halves in green chocolate.
  2. Place on parchment paper.
Green chocolate-covered marshmallow on white surface, shown from top and side view.
  1. While the chocolate is still wet, place a chocolate-covered marshmallow on top of each cookie half to create the hat.
  2. Let dry completely.
A glass bowl with chocolate wafers on the left and a piping bag filled with a chocolate mixture on the right, placed on a textured white surface.
  1. Melt the black chocolate using the same method and transfer to a piping bag.
  2. Cut a small hole in the tip.
Two images of a green top hat made from frosting. The left shows piping in progress; the right shows the finished hat with a black band and small yellow decorations.
  1. Pipe black chocolate around the base of each marshmallow to create the hatband.
  2. Use tweezers to add sprinkles for decoration.

whipped butter in a mixing bowl.

 Make the Buttercream

  1. In a mixing bowl, whip the butter on high speed until light and fluffy (about 3 minutes).
A mound of white powdered sugar sits in a clear mixing bowl.
  1. Add powdered sugar, vanilla extract, Irish cream, and orange food gel.
  2. Mix on low until combined.
Two images show a bowl with orange frosting. The left image includes added cream, while the right image shows the frosting fully mixed to a smooth consistency.
  1. Slowly pour in the heavy cream while mixing.
  2. Increase speed to medium-high and whip until the buttercream is smooth and fluffy.

Piping orange frosting onto a chocolate cupcake before and after completion.

Assemble the Cupcakes

  1. Fit a piping bag with the 1M tip and fill with buttercream.
  2. Pipe a swirl of buttercream onto each cupcake.
Six Saint Patrick's Day cupcakes with orange frosting are topped with green fondant hats, perfectly resembling leprechaun hats, on a light background.
  1. Gently place a leprechaun hat on top of each cupcake.
  2. Optional: Add extra sprinkles to the buttercream for more festive flair.

Did you make this recipe?

Do you have feedback that would be helpful to others? If so can help this small business owner by leaving a rating and a review in the comments section? Thank you for being part of the Savoring The Good Community. ~ Sarah

Buttercream Tip

For a smoother buttercream, sift the powdered sugar before adding it to the butter. This prevents lumps and creates a silky texture.

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Frequently asked questions, answers and tips:

Can I make these ahead of time?

Yes! Store them in an airtight container in the fridge for up to 3 days. Add the decorations just before serving.

Can I freeze these cupcakes?

Yes, but freeze them without the decorations. Thaw at room temperature before adding the buttercream and hats.

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St. Patrick's Day Cupcakes with Irish Cream & Leprechaun Hats
Sarah Mock, savoring a glass of red wine, smiles warmly indoors near a staircase. With her long brown hair and light blouse, she exudes relaxed elegance in this candid headshot.Sarah Mock
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Festive St. Patrick's Day cupcakes with Irish cream buttercream and leprechaun hat toppers. Ready in under an hour!
Print Recipe
Saint Patrick's Day cupcakes with green hats and orange frosting are beautifully decorated with shamrocks and gold buttons, all elegantly arranged on a vibrant green surface.
Prep TimePrep:25 minutes mins
Total TimeTotal:50 minutes mins
servingsServings:8 cupcakes

Ingredients

  • 8 Cupcakes
  • ½ Cup Butter Room Temperature , Salted
  • 2 ¼ Cups Powdered Sugar
  • 1 Teaspoon Vanilla Extract
  • 1 ½ Tablespoons Baileys Irish Cream
  • 1 Tablespoon Heavy Cream
  • Deep Orange Food Gel Color
  • 6-8 Marshmallows Large
  • 8 Ounces Green Melting Chocolate
  • 2 Ounces Black Melting Chocolate
  • St Patrick Sprinkles
  • 3-4 Sandwich Cookies
InstacartGet Recipe Ingredients

Instructions 

Prepare the Leprechaun Hats

  1. Melt green chocolate, dip marshmallows and cookies, assemble hats, and decorate with black chocolate and sprinkles.
    6-8 Marshmallows, 8 Ounces Green Melting Chocolate, 2 Ounces Black Melting Chocolate, 3-4 Sandwich Cookies, St Patrick Sprinkles

Make the Buttercream

  1. Whip butter, add powdered sugar, Irish cream, and food coloring. Mix until fluffy.
    ½ Cup Butter, 2 ¼ Cups Powdered Sugar, 1 Teaspoon Vanilla Extract, 1 ½ Tablespoons Baileys Irish Cream, 1 Tablespoon Heavy Cream, Deep Orange Food Gel Color

Assemble the Cupcakes

  1. Pipe buttercream onto cupcakes and top with leprechaun hats.
    8 Cupcakes

Nutrition

Serving: 1cupcake | Calories: 441kcal | Carbohydrates: 67g | Protein: 3g | Fat: 19g | Saturated Fat: 10g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 6g | Trans Fat: 0.5g | Cholesterol: 33mg | Sodium: 255mg | Potassium: 58mg | Fiber: 0.5g | Sugar: 54g | Vitamin A: 405IU | Vitamin C: 0.1mg | Calcium: 62mg | Iron: 1mg
CourseCourse: Dessert
CuisineCuisine: Irish
KeywordKeyword: St. Patrick's Day Cupcakes

Sarah Mock of savoringthegood.com headshot 2022

I am Sarah Mock. Welcome!

Sarah Mock is a classically trained Chef and graduate of Johnson & Wales University. A culinary blogger for 16 years Sarah helps the home cook prepare her recipes with professional results.

Get to know me

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Sarah Mock of savoringthegood.com headshot 2022

I'm Sarah Mock, Welcome!

Sarah Mock is a classically trained Chef and graduate of Johnson & Wales University. A culinary blogger for 17 years Sarah helps the home cook prepare her recipes with professional results.

Get to know me

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