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A close-up shot of a single Baileys Buttercream Brownie on a small plate, highlighting the dense, fudgy brownie texture and the smooth layer of frosting.

Baileys Buttercream Brownies (The Ultimate Fudgy Recipe)

Indulge in the ultimate adult treat with these Baileys Buttercream Brownies. A rich, fudgy brownie base topped with a silky, luscious buttercream frosting infused with real Baileys Irish Cream. Perfect for any special occasion or holiday dessert.
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Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Servings: 16 brownies
Course: Dessert
Cuisine: American
Calories: 350
Ingredients Equipment Method Notes

Ingredients
  

For the Fudgy Brownies
  • 1/2 cup unsalted butter melted
  • 1 cup granulated sugar
  • 4 oz unsweetened chocolate chopped
  • 2 large eggs room temperature
  • 1 tsp vanilla extract
  • 3/4 cup all-purpose flour
  • 1/4 tsp salt
For the Silky Baileys Buttercream
  • 1/2 cup unsalted butter softened
  • 2 cups powdered sugar sifted
  • 3 tbsp Baileys Irish Cream
  • 1 tbsp unsweetened cocoa powder
  • 1 tbsp heavy cream

Equipment

  • 1 8x8 inch baking pan
  • 1 Electric mixer
  • 2 Mixing Bowls

Instructions
 

Make the Brownies
  1. Preheat oven to 350°F (175°C). Grease and line an 8x8 inch baking pan with parchment paper, leaving an overhang.
  2. In a medium saucepan, melt 1/2 cup butter and the unsweetened chocolate over low heat until smooth. Remove from heat and cool slightly.
  3. Whisk in the granulated sugar. Add the eggs one at a time, followed by the vanilla extract.
  4. Gently fold in the all-purpose flour and salt until just combined. Do not overmix.
  5. Pour batter into the prepared pan and bake for 25-30 minutes, or until a skewer comes out with moist crumbs. Cool completely.
Prepare the Buttercream and Assemble
  1. In a large bowl, beat 1/2 cup of softened butter with an electric mixer until light and fluffy (about 3-4 minutes).
  2. Gradually add the sifted powdered sugar and cocoa powder, mixing on low then increasing to medium-high until smooth.
  3. Add the Baileys Irish Cream and heavy cream. Beat on medium-high for 2 minutes until light and airy.
  4. Spread the frosting evenly over the completely cooled brownies.
  5. Refrigerate for at least 30 minutes to set the frosting before slicing and serving.

Notes

For the fudgiest texture, be careful not to overbake the brownies. They should still be slightly soft in the center.
Ensure brownies are 100% cooled before frosting to prevent the buttercream from melting.
Store leftovers in an airtight container in the refrigerator for up to 5 days.
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